Update

backend/server.js

@@ -12,7 +12,24 @@ app.use(bodyParser.json());
 const cors = require('cors');
 app.use(cors({origin: 'http://localhost:4200', credentials: true}));
 
+const db = require("./app/models/mongodb.model");
+db.mongoose
+  .connect(db.url, {
+    useNewUrlParser: true,
+    useUnifiedTopology: true
+  }, function (err){
+    if(err){
+      console.log("Cannot connect to the database!", err);
+      process.exit();
+    } else{
+      console.log("Connected to the database!", db.url);
+    }
+  });
+
+require("./app/config/sessionJWT.config");
+require("./app/routes/tutorial.routes")(app);
+require("./app/routes/user.routes")(app);
+
 app.listen(port, '0.0.0.0',() => {
   console.log (`listening on port ${port}`);
 });
-