content: import React, { Component } from 'react';
  import Header from './header'
  class App extends Component {
    render() {
      return (
        <div>
          <Header />
          <div className="container" style={{ marginTop: '50px' }}>
            <div className="row">
              <div className="col-md-12">
                {this.props.children}
              </div>
            </div>
          </div>
        </div>
      );
    }
  }
  
  export default App;
  