created basic backend, with simple routes

src/routes/index.js

@@ -0,0 +1,14 @@
+const express = require('express');
+const router = express.Router();
+
+// Routes
+router.get('/', (req, res) => {
+  res.json({ message: 'Welcome to the Express backend!' });
+});
+
+// Example route
+router.get('/api/hello', (req, res) => {
+  res.json({ message: 'Hello from the backend!' });
+});
+
+module.exports = router; 

src/server.js

@@ -0,0 +1,20 @@
+const express = require('express');
+const cors = require('cors');
+require('dotenv').config();
+
+const routes = require('./routes');
+
+const app = express();
+const port = process.env.PORT || 3000;
+
+// Middleware
+app.use(cors());
+app.use(express.json());
+
+// Use routes
+app.use('/', routes);
+
+// Start server
+app.listen(port, () => {
+  console.log(`Server is running on port ${port}`);
+});