# Configuration

You can choose to configure HedgeDoc with either a config file or with environment variables.

Environment variables take precedence over configurations from the config files. They generally start with `CMD_` for our own options, but we also list node-specific options you can configure this way.

- Environment variables are processed in [`lib/config/environment.js`](../lib/config/environment.js) - so this is the first place to look if anything is missing not obvious from this document. The default values are defined in [`lib/config/default.js`](../lib/config/default.js), in case you wonder if you even need to override it.

- The config file is processed in [`lib/config/index.js`](../lib/config/index.js) - so this is the first place to look if anything is missing not obvious from this document. The default values are defined in [`lib/config/default.js`](../lib/config/default.js), in case you wonder if you even need to override it. To get started, it is a good idea to take the `config.json.example` and copy it
to `config.json` before filling in your own details.

**Note:** *Due to the rename process we renamed all `HMD_`-prefix variables to be `CMD_`-prefixed. The old ones continue to work.*

## Node.JS

| config file | environment | **default** and example value | description                                                                      |
| ----------- | ----------- | ----------------------------- | -------------------------------------------------------------------------------- |
|             | `NODE_ENV`  | `production` or `development` | set current environment (will apply corresponding settings in the `config.json`) |
| `debug`     | `DEBUG`     | `true` or `false`             | set debug mode, show more logs                                                   |

## HedgeDoc basics

| config file         | environment              | **default** and example value                                                                                                                       | description                                                                                                                                                                                                |
| ------------------- | ------------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `allowPDFExport`    | `CMD_ALLOW_PDF_EXPORT`   | **`true`** or `false`                                                                                                                               | Enable or disable PDF exports                                                                                                                                                                              |
|                     | `CMD_CONFIG_FILE`        | **no default**, `/path/to/config.json`                                                                                                              | optional override for the path to HedgeDoc's config file                                                                                                                                                     |
| `db`                |                          | **`undefined`**, `{ "dialect": "sqlite", "storage": "./db.hedgedoc.sqlite" }`                                                                         | set the db configs, [see more here](http://sequelize.readthedocs.org/en/latest/api/sequelize/)                                                                                                             |
| `dbURL`             | `CMD_DB_URL`             | **`undefined`**, `mysql://localhost:3306/database`                                                                                                  | Set the db in URL style. If set, then the relevant `db` config entries will be overridden.                                                                                                                 |
| `loglevel`          | `CMD_LOGLEVEL`           | **`info`**, `debug` ...                                                                                                                             | Defines what kind of logs are provided to stdout. Available options: `debug`, `verbose`, `info`, `warn`, `error`                                                                                           |
| `forbiddenNoteIDs`  | `CMD_FORBIDDEN_NOTE_IDS` | **`['robots.txt', 'favicon.ico', 'api', 'build', 'css', 'docs', 'fonts', 'js', 'uploads', 'vendor', 'views']`**, `['robots.txt']` or `'robots.txt'` | disallow creation of notes, even if `allowFreeUrl` or `CMD_ALLOW_FREEURL` is `true`                                                                                                                        |
| `imageUploadType`   | `CMD_IMAGE_UPLOAD_TYPE`  | **`filesystem`**, `imgur`, `s3`, `minio`, `azure`, `lutim`                                                                                          | Where to upload images. For S3, see our Image Upload Guides for [S3](guides/s3-image-upload.md) or [Minio](guides/minio-image-upload.md), also there's a whole section on their respective env vars below. |
| `sourceURL`         | `CMD_SOURCE_URL`         | **no default**, `https://github.com/hedgedoc/hedgedoc/tree/<current commit>`         | Provides the link to the source code of HedgeDoc on the entry page (Please, make sure you change this when you run a modified version)                                                                       |
| `tooBusyLag`        | `CMD_TOOBUSY_LAG`        | **`70`**                                                                                                                                            | CPU time for one event loop tick until node throttles connections. (milliseconds)                                                                                                                          |
| `staticCacheTime`   |                          | **`1 * 24 * 60 * 60 * 1000`**                                                                                                                       | static file cache time                                                                                                                                                                                     |
| `heartbeatInterval` |                          | **`5000`**                                                                                                                                          | socket.io heartbeat interval                                                                                                                                                                               |
| `heartbeatTimeout`  |                          | **`10000`**                                                                                                                                         | socket.io heartbeat timeout                                                                                                                                                                                |
| `documentMaxLength` |                          | **`100000`**                                                                                                                                        | note max length                                                                                                                                                                                            |
| `linkifyHeaderStyle`  |                          | **`keep-case`**, `lower-case`, `gfm`                                                                                                                | how is a header text converted into a link id                                                                                                                                                              |

## HedgeDoc paths stuff

these are rarely used for various reasons.

| config file       | environment | **default** and example values                        | description                                                                                      |
| ----------------- | ----------- | ----------------------------------------------------- | ------------------------------------------------------------------------------------------------ |
| `defaultNotePath` |             | **`./public/default.md`**                             | default note file path<sup>1</sup>, empty notes will be created with this template.              |
| `dhParamPath`     |             | **`undefined`**, `./cert/dhparam.pem`                 | SSL dhparam path<sup>1</sup> (only need when you set `useSSL`)                                   |
| `sslCAPath`       |             | **`undefined`**, `['./cert/COMODORSAAddTrustCA.crt']` | SSL ca chain<sup>1</sup> (only need when you set `useSSL`)                                       |
| `sslCertPath`     |             | **`undefined`**, `./cert/hedgedoc_io.crt`               | SSL cert path<sup>1</sup> (only need when you set `useSSL`)                                      |
| `sslKeyPath`      |             | **`undefined`**, `./cert/client.key`                  | SSL key path<sup>1</sup> (only need when you set `useSSL`)                                       |
| `tmpPath`         |             | **`os.tmpdir()`**, `./tmp/`                           | temp directory path<sup>1</sup>                                                                  |
| `docsPath`        |             | **`./public/docs`**                                   | docs directory path<sup>1</sup>                                                                  |
| `viewPath`        |             | **`./public/views`**                                  | template directory path<sup>1</sup>                                                              |
| `uploadsPath`     |             | **`./public/uploads`**                                | uploads directory<sup>1</sup> - needs to be persistent when you use imageUploadType `filesystem` |

**Note:** *relative paths are based on HedgeDoc's base directory*

## HedgeDoc Location

| config file      | environment           | **default** and example value                                    | description                                                                                                       |
| ---------------- | --------------------- | ---------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------- |
| `domain`         | `CMD_DOMAIN`          | **`null`**, `localhost`, `hedgedoc.org`                            | domain name                                                                                                       |
| `urlPath`        | `CMD_URL_PATH`        | **`null`**, `hedgedoc`                                             | If HedgeDoc is run from a subdirectory like `www.example.com/<urlpath>`                                             |
| `host`           | `CMD_HOST`            | **`0.0.0.0`**, `localhost`                                       | interface/ip to listen on                                                                                         |
| `port`           | `CMD_PORT`            | **`3000`**, `80`                                                 | port to listen on                                                                                                 |
| `path`           | `CMD_PATH`            | **no default**, `/var/run/hedgedoc.sock`                           | path to UNIX domain socket to listen on (if specified, `host` or `CMD_HOST` and `port` or `CMD_PORT` are ignored) |
| `protocolUseSSL` | `CMD_PROTOCOL_USESSL` | **`false`** or `true`                                            | set to use SSL protocol for resources path (only applied when domain is set)                                      |
| `useSSL`         |                       | **`false`** or `true`                                            | set to use SSL server (if `true`, will auto turn on `protocolUseSSL`)                                             |
| `urlAddPort`     | `CMD_URL_ADDPORT`     | **`false`** or `true`                                            | set to add port on callback URL (ports `80` or `443` won't be applied) (only applied when domain is set)          |
| `allowOrigin`    | `CMD_ALLOW_ORIGIN`    | **`['localhost']`**, `['hedgedoc.org']`, `['localhost', 'hedgedoc.org']` | domain name whitelist (use comma to separate)                                                                     |

## Web security aspects

| config file    | environment                   | **default** and example value                                                                                                              | description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| -------------- | ----------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------ |   |
| `hsts`         |                               | `{"enable": true, "maxAgeSeconds": 31536000, "includeSubdomains": true, "preload": true}`                                                  | [HSTS](https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security) options to use with HTTPS (default is the example value, max age is a year)                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|                | `CMD_HSTS_ENABLE`             | **`true`** or `false`                                                                                                                      | set to enable [HSTS](https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security) if HTTPS is also enabled (default is ` true`)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|                | `CMD_HSTS_INCLUDE_SUBDOMAINS` | **`true`** or `false`                                                                                                                      | set to include subdomains in HSTS (default is `true`)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|                | `CMD_HSTS_MAX_AGE`            | **`31536000`**, `60 * 60 * 24 * 365`                                                                                                       | max duration in seconds to tell clients to keep HSTS status (default is a year)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|                | `CMD_HSTS_PRELOAD`            | **`true`** or `false`                                                                                                                      | whether to allow preloading of the site's HSTS status (e.g. into browsers)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| `csp`          |                               | `{"enable": true, "directives": {"scriptSrc": "trustworthy-scripts.example.com"}, "upgradeInsecureRequests": "auto", "addDefaults": true}` | Configures [Content Security Policy](https://helmetjs.github.io/docs/csp/). Directives are passed to Helmet - see [their documentation](https://helmetjs.github.io/docs/csp/) for more information on the format. Some defaults are added to the configured values so that the application doesn't break. To disable this behaviour, set `addDefaults` to `false`. Further, if `usecdn` is on, some CDN locations are allowed too. By default (`auto`), insecure (HTTP) requests are upgraded to HTTPS via CSP if `useSSL` is on. To change this behaviour, set `upgradeInsecureRequests` to either `true` or `false`. |
|                | `CMD_CSP_ENABLE`              | **`true`** or `false`                                                                                                                      | whether to enable Content Security Policy (directives cannot be configured with environment variables)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|                | `CMD_CSP_REPORTURI`           | **`undefined`**, `https://<someid>.report-uri.com/r/d/csp/enforce`                                                                         | Allows to add a URL for CSP reports in case of violations                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| `cookiePolicy` | `CMD_COOKIE_POLICY`           | **`lax`**, `strict` or `none`                                                                                                              | Set a SameSite policy whether cookies are send from cross-origin. Be careful: setting a SameSite value of none without https breaks the editor                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | 

## Privacy and External Requests

| config file     | environment          | **default** and example value | description                                                                                                                                                                    |
| --------------- | -------------------- | ----------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `allowGravatar` | `CMD_ALLOW_GRAVATAR` | **`true`** or `false`         | set to `false` to disable [Libravatar](https://www.libravatar.org/) as profile picture source on your instance. Libravatar is a federated open-source alternative to Gravatar. |
| `useCDN`        | `CMD_USECDN`         | **`false`** or `true`         | set to use CDN resources or not (default is `false`)                                                                                                                           |

## Users and Privileges

| config file           | environment                 | **default** and example value                                           | description                                                                                                                                                    |
| --------------------- | --------------------------- | ----------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `allowAnonymous`      | `CMD_ALLOW_ANONYMOUS`       | **`true`** or `false`                                                   | Set to allow anonymous usage (default is `true`).                                                                                                              |
| `allowAnonymousEdits` | `CMD_ALLOW_ANONYMOUS_EDITS` | **`false`** or `true`                                                   | If `allowAnonymous` is `false`: allow users to select `freely` permission, allowing guests to edit existing notes (default is `false`).                        |
| `allowFreeURL`        | `CMD_ALLOW_FREEURL`         | **`false`** or `true`                                                   | Set to allow new note creation by accessing a nonexistent note URL. This is the behavior familiar from [Etherpad](https://github.com/ether/etherpad-lite).     |
| `defaultPermission`   | `CMD_DEFAULT_PERMISSION`    | **`editable`**, `freely`, `limited`, `locked`, `protected` or `private` | Set notes default permission (only applied on signed-in users).                                                                                                |
| `sessionName`         |                             | **`connect.sid`**                                                       | Cookie session name.                                                                                                                                           |
| `sessionLife`         | `CMD_SESSION_LIFE`          | **`14 * 24 * 60 * 60 * 1000`**, `1209600000` (14 days)                  | Cookie session life time in milliseconds.                                                                                                                      |
| `sessionSecret`       | `CMD_SESSION_SECRET`        | **`secret`**                                                            | Cookie session secret used to sign the session cookie. If none is set, one will randomly generated on each startup, meaning all your users will be logged out. |

## Login methods

### Email (local account)

| config file          | environment                | **default** and example value | description                                                                                                                                                                                                                                                                                                                                                                                                                   |
| -------------------- | -------------------------- | ----------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `email`              | `CMD_EMAIL`                | **`true`** or `false`         | Set to allow email sign-in. The default is `true`.                                                                                                                                                                                                                                                                                                                                                                            |
| `allowEmailRegister` | `CMD_ALLOW_EMAIL_REGISTER` | **`true`** or `false`         | Set to allow registration of new accounts using an email address. If set to `false`, you can still create accounts using the command line - see `bin/manage_users` for details (In production mode, remember to run it with `NODE_ENV` set as `production` in the enviroment). This setting has no effect if `email` or `CMD_EMAIL` is `false`. The default for `allowEmailRegister` or `CMD_ALLOW_EMAIL_REGISTER` is `true`. |

### Dropbox Login

| config file | environment                | **default** and example value        | description                                                                                                                                 |
| ----------- | -------------------------- | ------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------- |
| `dropbox`   |                            | `{clientID: ..., clientSecret: ...}` | An object containing the client ID and the client secret obtained by the [Dropbox developer tools](https://www.dropbox.com/developers/apps) |
|             | `CMD_DROPBOX_CLIENTID`     | **no default**                       | Dropbox API client id                                                                                                                       |
|             | `CMD_DROPBOX_CLIENTSECRET` | **no default**                       | Dropbox API client secret                                                                                                                   |

### Facebook Login

| config file | environment                 | **default** and example value        | description                                                                                                                           |
| ----------- | --------------------------- | ------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------- |
| `facebook`  |                             | `{clientID: ..., clientSecret: ...}` | An object containing the client ID and the client secret obtained by the [Facebook app console](https://developers.facebook.com/apps) |
|             | `CMD_FACEBOOK_CLIENTID`     | **no default**                       | Facebook API client id                                                                                                                |
|             | `CMD_FACEBOOK_CLIENTSECRET` | **no default**                       | Facebook API client secret                                                                                                            |

### GitHub Login

| config file | environment               | **default** and example value        | description                                                                                                                                                                     |
| ----------- | ------------------------- | ------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `github`    |                           | `{clientID: ..., clientSecret: ...}` | An object containing the client ID and the client secret obtained by the GitHub developer page. For more details have a look at the [GitHub auth guide](guides/auth/github.md). |
|             | `CMD_GITHUB_CLIENTID`     | **no default**                       | GitHub API client id                                                                                                                                                            |
|             | `CMD_GITHUB_CLIENTSECRET` | **no default**                       | GitHub API client secret                                                                                                                                                        |

### GitLab Login

| config file | environment               | **default** and example value                                                | description                                                                                                                         |
| ----------- | ------------------------- | ---------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------- |
| `gitlab`    |                           | `{baseURL: ..., scope: ..., version: ..., clientID: ..., clientSecret: ...}` | An object containing your GitLab application data. Refer to the [GitLab guide](guides/auth/gitlab-self-hosted.md) for more details! |
|             | `CMD_GITLAB_SCOPE`        | **no default**, `read_user` or `api`                                         | GitLab API requested scope (default is `api`) (GitLab snippet import/export need `api` scope)                                       |
|             | `CMD_GITLAB_BASEURL`      | **no default**                                                               | GitLab authentication endpoint, set to use other endpoint than GitLab.com (optional)                                                |
|             | `CMD_GITLAB_CLIENTID`     | **no default**                                                               | GitLab API client id                                                                                                                |
|             | `CMD_GITLAB_CLIENTSECRET` | **no default**                                                               | GitLab API client secret                                                                                                            |
|             | `CMD_GITLAB_VERSION`      | **`v4`**                                                                     | GitLab API version (v3 or v4)                                                                                                       |

### Google Login

| config file | environment               | **default** and example value                           | description                                                                                                                          |
| ----------- | ------------------------- | ------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------ |
| `google`    |                           | `{clientID: ..., clientSecret: ..., hostedDomain: ...}` | An object containing the client ID and the client secret obtained by the [Google API console](https://console.cloud.google.com/apis) |
|             | `CMD_GOOGLE_CLIENTID`     | **no default**                                          | Google API client id                                                                                                                 |
|             | `CMD_GOOGLE_CLIENTSECRET` | **no default**                                          | Google API client secret                                                                                                             |
|             | `CMD_GOOGLE_HOSTEDDOMAIN` | **no default**, `example.com`                           | Provided only if the user belongs to a hosted domain. default is `undefined`                                                         |

### LDAP Login

| config file | environment                 | **default** and example value                                                                                                                                                   | description                                                                                                     |
| ----------- | --------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------- |
| `ldap`      |                             | `{providerName: ..., url: ..., bindDn: ..., bindCredentials: ..., searchBase: ..., searchFilter: ..., searchAttributes: ..., usernameField: ..., useridField: ..., tlsca: ...}` | An object detailing the LDAP connection. Refer to the [LDAP-AD guide](guides/auth/ldap-ad.md) for more details! |
|             | `CMD_LDAP_URL`              | **no default**, `ldap://example.com`                                                                                                                                            | URL of LDAP server                                                                                              |
|             | `CMD_LDAP_BINDDN`           | **no default**                                                                                                                                                                  | bindDn for LDAP access                                                                                          |
|             | `CMD_LDAP_BINDCREDENTIALS`  | **no default**,                                                                                                                                                                 | bindCredentials for LDAP access                                                                                 |
|             | `CMD_LDAP_SEARCHBASE`       | **no default**, `o=users,dc=example,dc=com`                                                                                                                                     | LDAP directory to begin search from                                                                             |
|             | `CMD_LDAP_SEARCHFILTER`     | **no default**, `(uid={{username}})`                                                                                                                                            | LDAP filter to search with                                                                                      |
|             | `CMD_LDAP_SEARCHATTRIBUTES` | **no default**, `displayName, mail`                                                                                                                                             | LDAP attributes to search with (use comma to separate)                                                          |
|             | `CMD_LDAP_USERIDFIELD`      | **no default**, `uidNumber` or `uid` or `sAMAccountName`                                                                                                                        | The LDAP field which is used uniquely identify a user on HedgeDoc                                                 |
|             | `CMD_LDAP_USERNAMEFIELD`    | **no default**, fallback to userid                                                                                                                                              | The LDAP field which is used as the username on HedgeDoc                                                          |
|             | `CMD_LDAP_TLS_CA`           | **no default**, `server-cert.pem, root.pem`                                                                                                                                     | Root CA for LDAP TLS in PEM format (use comma to separate)                                                      |
|             | `CMD_LDAP_PROVIDERNAME`     | **no default**, `My institution`                                                                                                                                                | Optional name to be displayed at login form indicating the LDAP provider                                        |

### Mattermost Login

| config file  | environment                   | **default** and example value                      | description                                                                                                                                                     |
| ------------ | ----------------------------- | -------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `mattermost` |                               | `{baseURL: ..., clientID: ..., clientSecret: ...}` | An object containing the base URL of your Mattermost application data. Refer to the [Mattermost guide](guides/auth/mattermost-self-hosted.md) for more details! |
|              | `CMD_MATTERMOST_BASEURL`      | **no default**                                     | Mattermost authentication endpoint for versions below 5.0. For Mattermost version 5.0 and above, see [guide](guides/auth/mattermost-self-hosted.md).            |
|              | `CMD_MATTERMOST_CLIENTID`     | **no default**                                     | Mattermost API client id                                                                                                                                        |
|              | `CMD_MATTERMOST_CLIENTSECRET` | **no default**                                     | Mattermost API client secret                                                                                                                                    |

### OAuth2 Login

| config file | environment                                 | **default** and example value                                                                                                                                                                                       | description                                                                                                                                                                                                                                                                            |
| ----------- | ------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `oauth2`    |                                             | `{baseURL: ..., userProfileURL: ..., userProfileUsernameAttr: ..., userProfileDisplayNameAttr: ..., userProfileEmailAttr: ..., tokenURL: ..., authorizationURL: ..., clientID: ..., clientSecret: ..., scope: ...}` | An object detailing your OAuth2 provider. Refer to the [Mattermost](guides/auth/mattermost-self-hosted.md) or [Nextcloud](guides/auth/nextcloud.md) examples for more details!                                                                                                         |
|             | `CMD_OAUTH2_USER_PROFILE_URL`               | **no default**, `https://example.com`                                                                                                                                                                               | Where to retrieve information about a user after successful login. Needs to output JSON. (no default value) Refer to the [Mattermost](guides/auth/mattermost-self-hosted.md) or [Nextcloud](guides/auth/nextcloud.md) examples for more details on all of the `CMD_OAUTH2...` options. |
|             | `CMD_OAUTH2_USER_PROFILE_USERNAME_ATTR`     | **no default**, `name`                                                                                                                                                                                              | where to find the username in the JSON from the user profile URL. (no default value)                                                                                                                                                                                                   |
|             | `CMD_OAUTH2_USER_PROFILE_DISPLAY_NAME_ATTR` | **no default**, `display-name`                                                                                                                                                                                      | where to find the display-name in the JSON from the user profile URL. (no default value)                                                                                                                                                                                               |
|             | `CMD_OAUTH2_USER_PROFILE_EMAIL_ATTR`        | **no default**, `email`                                                                                                                                                                                             | where to find the email address in the JSON from the user profile URL. (no default value)                                                                                                                                                                                              |
|             | `CMD_OAUTH2_TOKEN_URL`                      | **no default**, `https://example.com`                                                                                                                                                                               | sometimes called token endpoint, please refer to the documentation of your OAuth2 provider (no default value)                                                                                                                                                                          |
|             | `CMD_OAUTH2_AUTHORIZATION_URL`              | **no default**, `https://example.com`                                                                                                                                                                               | authorization URL of your provider, please refer to the documentation of your OAuth2 provider (no default value)                                                                                                                                                                       |
|             | `CMD_OAUTH2_CLIENT_ID`                      | **no default**, `afae02fckafd...`                                                                                                                                                                                   | you will get this from your OAuth2 provider when you register HedgeDoc as OAuth2-client, (no default value)                                                                                                                                                                            |
|             | `CMD_OAUTH2_CLIENT_SECRET`                  | **no default**, `afae02fckafd...`                                                                                                                                                                                   | you will get this from your OAuth2 provider when you register HedgeDoc as OAuth2-client, (no default value)                                                                                                                                                                            |
|             | `CMD_OAUTH2_PROVIDERNAME`                   | **no default**, `My institution`                                                                                                                                                                                    | Optional name to be displayed at login form indicating the oAuth2 provider                                                                                                                                                                                                             |
|             | `CMD_OAUTH2_SCOPE`                          | **no default**, `openid email profile`                                                                                                                                                                              | Scope to request for OIDC (OpenID Connect) providers.                                                                                                                                                                                                                                  |

### SAML Login

| config file | environment                             | **default** and example value                                                                                                                                                                                                          | description                                                                                                                                            |
| ----------- | --------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `saml`      |                                         | `{idpSsoUrl: ..., idpCert: ..., clientCert: ..., issuer: ..., identifierFormat: ..., disableRequestedAuthnContext: ..., groupAttribute: ..., externalGroups: [], requiredGroups: [], attribute: {id: ..., username: ..., email: ...}}` | An object detailing your SAML provider. Refer to the [OneLogin](guides/auth/saml-onelogin.md) and [SAML](guides/auth/saml.md) guides for more details! |
|             | `CMD_SAML_IDPSSOURL`                    | **no default**, `https://idp.example.com/sso`                                                                                                                                                                                          | authentication endpoint of IdP. for details, see [guide](guides/auth/saml-onelogin.md).                                                                |
|             | `CMD_SAML_IDPCERT`                      | **no default**, `/path/to/cert.pem`                                                                                                                                                                                                    | certificate file path of IdP in PEM format                                                                                                             |
|             | `CMD_SAML_CLIENTCERT`                   | **no default**, `/path/to/privatecert.pem`                                                                                                                                                                                             | certificate file path for the client in PEM format (optional)                                                                                          |
|             | `CMD_SAML_ISSUER`                       | **no default**                                                                                                                                                                                                                         | Issuer to supply to identity provider (optional, default: `serverURL` config)"                                                                         |
|             | `CMD_SAML_DISABLEREQUESTEDAUTHNCONTEXT` | **no default**, `true` or `false`                                                                                                                                                                                                      | true to allow any authentication method, false restricts to password authentication (PasswordProtectedTransport) method (default: false)               |
|             | `CMD_SAML_IDENTIFIERFORMAT`             | **`urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress`**                                                                                                                                                                           | name identifier format (optional, default: `urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress`)                                                   |
|             | `CMD_SAML_GROUPATTRIBUTE`               | **no default**, `memberOf`                                                                                                                                                                                                             | attribute name for group list (optional)                                                                                                               |
|             | `CMD_SAML_REQUIREDGROUPS`               | **no default**, `hedgedoc-users`                                                                                                                                                                                                         | group names that allowed (use vertical bar to separate) (optional)                                                                                   |
|             | `CMD_SAML_EXTERNALGROUPS`               | **no default**, `Temporary-staff`                                                                                                                                                                                                      | group names that not allowed (use vertical bar to separate) (optional)                                                                                 |
|             | `CMD_SAML_ATTRIBUTE_ID`                 | **no default**, `sAMAccountName`                                                                                                                                                                                                       | attribute map for `id` (optional, default: NameID of SAML response)                                                                                    |
|             | `CMD_SAML_ATTRIBUTE_USERNAME`           | **no default**, `mailNickname`                                                                                                                                                                                                         | attribute map for `username` (optional, default: NameID of SAML response)                                                                              |
|             | `CMD_SAML_ATTRIBUTE_EMAIL`              | **no default**, `mail`                                                                                                                                                                                                                 | attribute map for `email` (optional, default: NameID of SAML response if `CMD_SAML_IDENTIFIERFORMAT` is default)                                       |

### Twitter Login

| config file | environment                  | **default** and example value             | description                                                                                                                                                                                                      |
| ----------- | ---------------------------- | ----------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `twitter`   |                              | `{consumerKey: ..., consumerSecret: ...}` | An object containing the consumer key and secret obtained by the [Twitter developer tools](https://developer.twitter.com/apps). For more details have a look at the [Twitter auth guide](guides/auth/twitter.md) |
|             | `CMD_TWITTER_CONSUMERKEY`    | **no default**                            | Twitter API consumer key                                                                                                                                                                                         |
|             | `CMD_TWITTER_CONSUMERSECRET` | **no default**                            | Twitter API consumer secret                                                                                                                                                                                      |

## Upload Storage

These are only relevant when they are also configured in sync with their
`CMD_IMAGE_UPLOAD_TYPE`. Also keep in mind, that `filesystem` is available, so
you don't have to use either of these.

### Amazon S3

| config file | environment                | **default** and example value                                                                                     | description                                                                                                                                |
| ----------- | -------------------------- | ----------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------ |
| `s3`        |                            | `{ "accessKeyId": "YOUR_S3_ACCESS_KEY_ID", "secretAccessKey": "YOUR_S3_ACCESS_KEY", "region": "YOUR_S3_REGION" }` | When `imageuploadtype` be set to `s3`, you would also need to setup this key, check our [S3 Image Upload Guide](guides/s3-image-upload.md) |
|             | `CMD_S3_ACCESS_KEY_ID`     | **no default**                                                                                                    | AWS access key id                                                                                                                          |
|             | `CMD_S3_SECRET_ACCESS_KEY` | **no default**                                                                                                    | AWS secret key                                                                                                                             |
|             | `CMD_S3_REGION`            | **no default**, `ap-northeast-1`                                                                                  | AWS S3 region                                                                                                                              |
| `s3bucket`  | `CMD_S3_BUCKET`            | **no default**                                                                                                    | AWS S3 bucket name                                                                                                                         |
|             | `CMD_S3_ENDPOINT ENV`      | **no default**                                                                                                    | S3 API endpoint if you don't use AWS name                                                                                                  |

### Azure Blob Storage

| config file | environment                   | **default** and example value | description                                                               |
| ----------- | ----------------------------- | ----------------------------- | ------------------------------------------------------------------------- |
|             | `CMD_AZURE_CONNECTION_STRING` | **no default**                | Azure Blob Storage connection string                                      |
|             | `CMD_AZURE_CONTAINER`         | **no default**                | Azure Blob Storage container name (automatically created if non existent) |

### imgur

| config file | environment          | **default** and example value  | description         |
| ----------- | -------------------- | ------------------------------ | ------------------- |
|             | `CMD_IMGUR_CLIENTID` | **no default**                 | Imgur API client id |

### Minio

| config file | environment            | **default** and example value                                                                                                             | description                                                                                                                                     |
| ----------- | ---------------------- | ----------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------- |
| `minio`     |                        | `{ "accessKey": "YOUR_MINIO_ACCESS_KEY", "secretKey": "YOUR_MINIO_SECRET_KEY", "endpoint": "YOUR_MINIO_HOST", port: 9000, secure: true }` | When `imageUploadType` is set to `minio`, you need to set this key. Also check out our [Minio Image Upload Guide](guides/minio-image-upload.md) |
|             | `CMD_MINIO_ACCESS_KEY` | **no default**                                                                                                                            | Minio access key                                                                                                                                |
|             | `CMD_MINIO_SECRET_KEY` | **no default**                                                                                                                            | Minio secret key                                                                                                                                |
|             | `CMD_MINIO_ENDPOINT`   | **no default**, `minio.example.org`                                                                                                       | Address of your Minio endpoint/instance                                                                                                         |
|             | `CMD_MINIO_PORT`       | **no default**, `9000`                                                                                                                    | Port that is used for your Minio instance                                                                                                       |
|             | `CMD_MINIO_SECURE`     | **no default**, `true`                                                                                                                    | If set to `true` HTTPS is used for Minio                                                                                                        |

### Lutim

| config file | environment     | **default** and example value | description                                                                 |
| ----------- | --------------- | ----------------------------- | --------------------------------------------------------------------------- |
| `lutim`     |                 | `{"url": "YOUR_LUTIM_URL"}`   | When `imageUploadType` is set to `lutim`, you can setup the lutim url       |
|             | `CMD_LUTIM_URL` | **`https://framapic.org/`**   | When `CMD_IMAGE_UPLOAD_TYPE` is set to `lutim`, you can setup the lutim url |
