network-resurrector/src/index.js

import React, { Suspense } from "react";
import ReactDOM from "react-dom";
import "./index.css";
import App from "./components/App";
import { BrowserRouter as Router } from "react-router-dom";

ReactDOM.render(
  <React.StrictMode>
    <Router basename={process.env.PUBLIC_URL || ""}>
      <Suspense fallback={<div>Loading...</div>}>
        <App />
      </Suspense>
    </Router>
  </React.StrictMode>,
  document.getElementById("root")
);