Add frontend to be served by backend.

backend/src/js/app.js

@@ -0,0 +1,16 @@
+const express = require('express');
+const bodyParser = require('body-parser');
+const applicationController = require('./controller/applicationCtrl');
+const userController = require('./controller/userCtrl');
+
+const port = 3000;
+
+const app = express();
+app.use(bodyParser.urlencoded({ extended: true }));
+app.use(bodyParser.json());
+app.use(express.static('backend/public'));
+
+app.use('/apps', applicationController);
+app.use('/users', userController);
+
+app.listen(port, () => console.log('Mock is listening at port ', port, '\n'));