From zero

server/index.js

@@ -0,0 +1,12 @@
+import express from "express";
+
+const app = express();
+const PORT = 3000;
+
+app.get("/", (req, res) => {
+  res.send("Hello from Express!");
+});
+
+app.listen(PORT, () => {
+  console.log(`Express server running at http://localhost:${PORT}/`);
+});