Set up Express server with CORS and proxy middleware

server.js

@@ -0,0 +1,39 @@
+const express = require('express');
+const cors = require('cors');
+const { createProxyMiddleware } = require('http-proxy-middleware');
+
+const app = express();
+
+// 1. Allow All Origins (Public Proxy Mode)
+app.use(cors({
+    origin: '*', 
+    methods: ['GET', 'POST', 'OPTIONS'],
+    allowedHeaders: ['Content-Type', 'X-MBX-APIKEY'],
+    credentials: false 
+}));
+
+// 2. Health Check
+app.get('/', (req, res) => {
+    res.send('Quantum Proxy is Running on Glitch!');
+});
+
+// 3. Proxy Logic
+const proxyOptions = {
+    target: 'https://api.binance.com',
+    changeOrigin: true,
+    pathRewrite: {
+        '^/api/v3': '/api/v3'
+    },
+    onProxyRes: (proxyRes) => {
+        // Strip restrictive headers from Binance so browser accepts response
+        delete proxyRes.headers['access-control-allow-origin'];
+        proxyRes.headers['Access-Control-Allow-Origin'] = '*';
+    }
+};
+
+app.use('/api', createProxyMiddleware(proxyOptions));
+
+const PORT = process.env.PORT || 3000;
+app.listen(PORT, () => {
+    console.log(`Server running on port ${PORT}`);
+});