title: Ruby on Rails 3.2.1 doesn't show images on Heroku under Nivo slider
body: <p>My Ruby on Rails 3.2.1 APP doesn't show pictures when it is uploaded on Heroku and I really don't know where is the problem. On localhost:3000 all is working prefect. I have made a test and added a picture in content, not under Nivo slider tags and all is perfect, but under Nivo my app doesn't displaying anything.</p>
  
  <p>Nivo slider tags:</p>
  
  <pre><code>&lt;div class="slider-wrapper theme-default"&gt;
      &lt;div class="ribbon"&gt;&lt;/div&gt;
      &lt;div id="slider" class="nivoSlider"&gt;
          &lt;%=image_tag "/assets/birz.JPG"%&gt;
          &lt;%=image_tag "100.jpg"%&gt;
          &lt;%=image_tag "102.jpg"%&gt; 
          &lt;%=image_tag "103.jpg"%&gt; 
          &lt;%=image_tag "104.jpg"%&gt; 
          &lt;%=image_tag "105.jpg"%&gt; 
          &lt;%=image_tag "106.jpg"%&gt; 
          &lt;%=image_tag "107.jpg"%&gt; 
          &lt;%=image_tag "108.jpg"%&gt; 
          &lt;%=image_tag "109.jpg"%&gt; 
          &lt;%=image_tag "110.jpg"%&gt; 
          &lt;%=image_tag "111.jpg"%&gt; 
          &lt;%=image_tag "112.jpg"%&gt; 
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p><strong>production.rb</strong></p>
  
  <pre><code>  # Disable Rails's static asset server (Apache or nginx will already do this)
    config.serve_static_assets = true
  
    # Compress JavaScripts and CSS
    config.assets.compress = true
  
    # Don't fallback to assets pipeline if a precompiled asset is missed
    config.assets.compile = false
  
    # Generate digests for assets URLs
    config.assets.digest = true
  </code></pre>
  
  <p><strong>Heroku stack:</strong></p>
  
  <pre><code>  aspen-mri-1.8.6
    bamboo-mri-1.9.2
    bamboo-ree-1.8.7
  * cedar (beta)
  </code></pre>