feat: add build pipeline

app/src/app.tsx

@@ -0,0 +1,9 @@
+const App = () => {
+  return (
+    <div>
+      <h1>Hello World</h1>
+    </div>
+  );
+};
+
+export { App };

app/src/main.tsx

@@ -0,0 +1,14 @@
+import { StrictMode } from 'react';
+import { createRoot } from 'react-dom/client';
+import { App } from './app.tsx';
+
+const root = document.createElement('div');
+if (!root) {
+  throw new Error('Root element not found');
+}
+
+createRoot(root).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+);

app/src/vite-env.d.ts

@@ -0,0 +1 @@
+/// <reference types="vite/client" />