goldenChat base source add

frontend_golden/src/index.tsx

@@ -0,0 +1,12 @@
+import React from 'react';
+import ReactDOM from 'react-dom/client';
+import AppRouter from './AppRouter';
+import './index.css';
+
+const root = ReactDOM.createRoot(
+  document.getElementById('root') as HTMLElement
+);
+root.render(
+  <AppRouter />
+);
+