added server.js for frontend when not using nginx in deployment

frontend/server.js

@@ -0,0 +1,29 @@
+import express from 'express';
+import path from 'path';
+import cors from 'cors';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const app = express();
+const PORT = process.env.PORT || 3000;
+
+// Enable CORS for API calls
+app.use(cors({
+  origin: process.env.CORS_ORIGIN || '*',
+  credentials: true
+}));
+
+// Serve static files from dist directory
+app.use(express.static(path.join(__dirname, 'dist')));
+
+// Handle SPA routing - serve index.html for all routes
+app.get('*', (req, res) => {
+  res.sendFile(path.join(__dirname, 'dist', 'index.html'));
+});
+
+app.listen(PORT, () => {
+  console.log(`Frontend server running on port ${PORT}`);
+  console.log(`Serving from: ${path.join(__dirname, 'dist')}`);
+});