text: import React from 'react';
  import ReactDOM from 'react-dom';
  
  import Header from './components/header';
  
  
  var App = React.createClass({
      render: function() {
          return (
              <div>
                  <Header />
              </div>
  
          );
      }
  });
  // We need to say React take this component generated HTML and put it on the page (in the DOM)
  // RENDERING COMPONENT TO THE DOM
  ReactDOM.render(<App />, document.querySelector('.container')); // create an instance of App class: <App></App> - and that what we are sending to the DOM.
  //ReactDOM.render( INSTANCE OF COMPONENT  ,  WHERE TO RENDER IT);
  