added all necessary configs to use structor

see https://github.com/traefik/structor

Signed-off-by: Philip Molares <philip.molares@udo.edu>

docs/guides/index.md

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-## Guides
-
-In this section we try to provide you with some step-by-step guides for common scenarios to configure HedgeDoc to your needs.

docs/images/favicon.png

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+../../public/icons/favicon-32x32.png

docs/images/logo.png

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+../../public/icons/android-chrome-512x512.png

docs/index.md

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 # Welcome to the HedgeDoc Documentation
 
-This page should help you host and configure your own HedgeDoc instance.
+![HedgeDoc Logo](images/hedgedoc_logo_horizontal.png)
 
-We provide: 
-- [Guides for common scenarios](guides/index.md)
- 
+HedgeDoc lets you create real-time collaborative markdown notes. You can test-drive
+it by visiting our [HedgeDoc demo server][hedgedoc-demo].
+
+It is inspired by Hackpad, Etherpad and similar collaborative editors. This
+project originated with the team at [HackMD](https://hackmd.io) and now forked
+into its own organisation. [A longer writeup can be read in the history doc](history.md) or [you can have a look at an explanitory graph over at our website][hedgedoc-history].
+
+If you have any questions that aren't answered here, feel free to ask us on [Matrix][matrix.org-url], stop by our [community forums][hedgedoc-community] or have a look at our [FAQ][hedgedoc-faq].
+
+
+[hedgedoc-demo]: https://demo.hedgedoc.org
+[hedgedoc-history]: https://hedgedoc.org/history
+[hedgedoc-faq]: https://hedgedoc.org/faq
+[matrix.org-url]: https://chat.hedgedoc.org
+[hedgedoc-community]: https://community.hedgedoc.org