title: add background image in react with bootstrap
body: <p>if there s someone who can help me to fix this problem.
  i can t add a background image to the Navbar in react.js
  i will be thankful if there s someone who can help me.</p>
  
  <pre><code>import React, { Component } from 'react';
  import Navbar from './Navbar';
  import './navbar.css';
  
      class App extends Component {
    render() {
      return (
        &lt;div className="logo"&gt;
  
        &lt;div&gt;
          &lt;Navbar/&gt;
        &lt;/div&gt;
  
  
        &lt;/div&gt;
      );
    }
  }
  
  export default App;
  
  &lt;--Style--!&gt;
  .logo{
  
      background-image: url('./header.jpg');
  
  }
  </code></pre>