Update Readme

frontend/src/App.jsx.bak

@@ -0,0 +1,11 @@
+import React from "react";
+import Stacks from "./Stacks.jsx";
+
+export default function App() {
+  return (
+    <div className="p-8 font-sans">
+      <h1 className="text-3xl font-bold mb-6">StackPulse</h1>
+      <Stacks />
+    </div>
+  );
+}