build: move server.js into src directory

src/server.js

@@ -0,0 +1,22 @@
+import express from 'express';
+import dotenv from 'dotenv';
+import path from 'path'; // Import the path module
+import routes from './routes.js'; // Import routes from routes.js
+import { validateEnvVariables } from './envValidator.js';
+
+dotenv.config();
+
+validateEnvVariables();
+
+const app = express();
+const PORT = process.env.PORT || 3002;
+
+app.use(express.json());
+
+app.use(express.static(path.join(process.cwd(), 'public')));
+
+app.use('/', routes);
+
+app.listen(PORT, () => {
+    console.log(`Server is running on http://localhost:${PORT}`);
+});