text: import React, {PropTypes} from 'react';
  
  class App extends React.Component {
    render() {
      return (
        <div className="container-fluid">
          <header className="header" />
  
          <div className="content">
            {this.props.children}
          </div>
  
          <footer className="footer" />
        </div>
      );
    }
  }
  
  App.propTypes = {
    children: PropTypes.object.isRequired
  };
  
  export default App;
  