const express = require("express"); const app = express(); const PORT = process.env.PORT || 5900; function generatePin() { return Math.floor(1000 + Math.random() * 9000).toString(); } app.get("/", (req, res) => { res.send(` Stripe Elements Demo

Add Card

`); }); app.listen(PORT, "0.0.0.0", () => { console.log(`Server running on http://127.0.0.1:${PORT}`); });