feat: Added backend server with home page message

backend/server.js

@@ -0,0 +1,7 @@
+const express = require('express');
+
+const app = express();
+
+app.get('/', (req, res) => res.send('Your backend server is running correctly'));
+
+app.listen(5000, () => console.log('Server is running on port 5000'));