content: import React from 'react';
  import ReactDOM from 'react-dom';
  import CssBaseline from '@material-ui/core/CssBaseline';
  import App from './App';
  import theme from './theme';
  import { ThemeProvider } from '@material-ui/styles';
  
  ReactDOM.render(
    <ThemeProvider theme={theme}>
      {/* CssBaseline kickstart an elegant, consistent, and simple baseline to build upon. */}
      <CssBaseline />
      <App />
    </ThemeProvider>,
    document.querySelector('#root'),
  );
  