Port to typescript

webUI/react/src/index.tsx

@@ -0,0 +1,19 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import App from './App';
+import reportWebVitals from './reportWebVitals';
+import './index.css';
+// roboto font
+import 'fontsource-roboto';
+
+ReactDOM.render(
+    <React.StrictMode>
+        <App />
+    </React.StrictMode>,
+    document.getElementById('root'),
+);
+
+// If you want to start measuring performance in your app, pass a function
+// to log results (for example: reportWebVitals(console.log))
+// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
+reportWebVitals();