Live update + class progress

package.json

@@ -23,10 +23,12 @@
     "express": "^4.16.4",
     "express-ejs-layouts": "^2.5.0",
     "express-session": "^1.15.6",
+    "mongodb": "^3.6.3",
     "mongoose": "^5.7.5",
     "multer": "^1.4.2",
     "passport": "^0.4.0",
-    "passport-local": "^1.0.0"
+    "passport-local": "^1.0.0",
+    "socket.io": "^3.0.5"
   },
   "devDependencies": {
     "nodemon": "^1.18.9"