Chapter 9: Helmet samples update

Chapter09/express-helmet/server.js

@@ -0,0 +1,12 @@
+const express = require("express");
+const app = express();
+const helmet = require("helmet");
+
+app.use(helmet());
+
+app.get("/", (req, res) => res.send("Hello World!"));
+
+app.listen(3000, () => {
+  console.log("Server listening on port 3000");
+});
+