text: import React, { Component } from 'react';
  import Header from './Header';
  import BoardContainer from './BoardContainer';
  // If you use React Router, make this component
  // render <Router> with your routes. Currently,
  // only synchronous routes are hot reloaded, and
  // you will see a warning from <Router> on every reload.
  // You can ignore this warning. For details, see:
  // https://github.com/reactjs/react-router/issues/2182
  export default class App extends Component {
      render() {
          return (
              <Header>
                  <BoardContainer />
              </Header>
          );
      }
  }