add .dockerignore, add Dockerfile, add default.nix, udpate README.md, move packages into respective category(dev/production)

package.json

@@ -12,6 +12,11 @@
   "author": "Felix",
   "license": "MIT",
   "dependencies": {
+    "socket.io": "^2.2.0",
+    "express": "^4.16.4",
+    "popper.js": "^1.14.7"
+  },
+  "devDependencies": {
     "@fortawesome/fontawesome-svg-core": "^1.2.17",
     "@fortawesome/free-brands-svg-icons": "^5.8.1",
     "@fortawesome/free-regular-svg-icons": "^5.8.1",
@@ -22,7 +27,6 @@
     "css-loader": "^2.1.1",
     "datatables": "^1.10.18",
     "exports-loader": "^0.7.0",
-    "express": "^4.16.4",
     "extract-text-webpack-plugin": "^4.0.0-beta.0",
     "file-loader": "^3.0.1",
     "howler": "^2.1.1",
@@ -32,16 +36,12 @@
     "jquery": "^3.3.1",
     "node-sass": "^4.11.0",
     "pdfobject": "^2.1.1",
-    "popper.js": "^1.14.7",
     "postcss-loader": "^3.0.0",
     "raw-loader": "^2.0.0",
     "sass-loader": "^7.1.0",
-    "socket.io": "^2.2.0",
     "style-loader": "^0.23.1",
     "webpack": "^4.29.6",
-    "webpack-merge": "^4.2.1"
-  },
-  "devDependencies": {
+    "webpack-merge": "^4.2.1",
     "webpack-cli": "^3.3.0"
   }
 }