Run database migrations automatically on startup

This commit removes the need for separate migrations with the sequelize-cli
by running them with umzug on application startup.

This is a port of #384

Co-authored-by: Sheogorath <sheogorath@shivering-isles.com>
Signed-off-by: David Mehren <git@herrmehren.de>

package.json

@@ -14,7 +14,7 @@
     "dev": "webpack --config webpack.dev.js --progress --watch",
     "heroku-prebuild": "bin/heroku",
     "build": "webpack --config webpack.prod.js --progress",
-    "start": "sequelize db:migrate && node app.js"
+    "start": "node app.js"
   },
   "dependencies": {
     "@passport-next/passport-openid": "^1.0.0",
@@ -117,7 +117,6 @@
     "scrypt-kdf": "^2.0.1",
     "select2": "^3.5.2-browserify",
     "sequelize": "^5.21.1",
-    "sequelize-cli": "^6.0.0",
     "shortid": "2.2.16",
     "socket.io": "^2.1.1",
     "socket.io-client": "^2.1.1",
@@ -128,6 +127,7 @@
     "tedious": "^6.6.0",
     "toobusy-js": "^0.5.1",
     "turndown": "^7.0.0",
+    "umzug": "^2.3.0",
     "uuid": "^8.0.0",
     "validator": "^13.0.0",
     "velocity-animate": "^1.4.0",