Initialize backend

Author: trngdothuy

chat-app/backend/server.js

@@ -0,0 +1,17 @@
+const express = require("express");
+const cors = require("cors");
+
+const app = express();
+
+app.use(cors());
+app.use(express.json());
+
+app.get("/health", (req, res) => {
+  res.json({ status: "ok" });
+});
+
+const PORT = 3000;
+
+app.listen(PORT, () => {
+  console.log(`Server running on port ${PORT}`);
+});