Initial config

src/App.tsx

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+import React from "react";
+import "./App.css";
+
+function App() {
+  return <div className="App"></div>;
+}
+
+export default App;

src/index.tsx

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+import React from "react";
+import ReactDOM from "react-dom";
+import "./index.css";
+import App from "./App";
+
+ReactDOM.render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>,
+  document.getElementById("root")
+);

src/react-app-env.d.ts

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+/// <reference types="react-scripts" />