text: import React from 'react';
  import ReactDOM from 'react-dom';
  import './index.css';
  import App from './App';
  import * as serviceWorker from './serviceWorker';
  import MessageContextProvider from './contexts/MessageContexts';
  import BContextProvider from './contexts/BContext';
  
  ReactDOM.render(
      <MessageContextProvider>
          <BContextProvider>
              <App />
          </BContextProvider>
      </MessageContextProvider> , document.getElementById('root'));
  
  // If you want your app to work offline and load faster, you can change
  // unregister() to register() below. Note this comes with some pitfalls.
  // Learn more about service workers: https://bit.ly/CRA-PWA
  serviceWorker.unregister();
  