content: import React from 'react';
  import ReactDOM from 'react-dom';
  import './index.css';
  import App from './app.js';
  import {BrowserRouter as Router, Route} from 'react-router-dom';
  // import registerServiceWorker from './registerServiceWorker';
  // import {unregister} from './registerServiceWorker';
  
  ReactDOM.render(<Router><Route component={App} /></Router>, document.getElementById('root'));
  // registerServiceWorker();
  