title: Adding background image in Rails 4
body: <p>How do I include a background image in Rails 4? I am trying to add it onto a div I have in my HTML. Currently, the image is in my <code>/assets/images</code> directory. </p>
  
  <p>HTML:</p>
  
  <pre><code>&lt;header&gt;
    &lt;div class="background_image"&gt;
  
    &lt;/div&gt;
  &lt;/header&gt;
  </code></pre>
  
  <p>CSS:</p>
  
  <pre><code>.background_image {
      background: url(/assets/header-bg.jpg);
  }
  </code></pre>
  
  <p>With the code I currently have, no images are being displayed</p>