Revamp vanilla-app

apps/vanilla-app/server.js

@@ -0,0 +1,19 @@
+const path = require("path");
+const express = require("express");
+const serveIndex = require("serve-index");
+const app = express();
+const PORT = 8080;
+const ROOT = path.join(__dirname, "public");
+
+app.use((_, res, next) => {
+  res.append("Cross-Origin-Opener-Policy", "same-origin");
+  res.append("Cross-Origin-Embedder-Policy", "require-corp");
+  next();
+});
+
+app.use(express.static(ROOT));
+app.use("/", serveIndex(ROOT));
+
+app.listen(PORT, () => {
+  console.log(`Listening on port ${PORT}`);
+});