Add core project files

routes/contactRoutes.js

@@ -0,0 +1,8 @@
+const express = require('express');
+const router = express.Router();
+const { saveContact } = require('../controllers/contactController');
+
+// ✅ Use `router.post`, NOT `app.post`
+router.post('/', saveContact);
+
+module.exports = router;