website: support react 18.

Author: jaywcjlove

website/index.tsx

@@ -1,5 +1,6 @@
-import React from 'react';
-import ReactDOM from 'react-dom';
 import App from './App';
+import { createRoot } from 'react-dom/client';
 
-ReactDOM.render(<App />, document.getElementById('root'));
+const container = document.getElementById('root');
+const root = createRoot(container!);
+root.render(<App />);