title: Rails + Heroku not finding controller specific assets
body: <p>I'm using Heroku to run a Rails app: grafly.herokuapp.com. However, my CSS and JS for the controller aren't being found, while other CSS and JS (precompiled into application) are being found. This only happens on Heroku. Local is fine. What can cause this?</p>
  
  <p>I use controller specific JS and CSS. Here is my  in views/layouts/application.html.erb</p>
  
  <pre><code>&lt;head&gt;
    &lt;title&gt;Grafly&lt;/title&gt;
    &lt;%= csrf_meta_tags %&gt;
    &lt;%= stylesheet_link_tag "application", media: "all", "data-turbolinks-track" =&gt; true %&gt;
    &lt;%= stylesheet_link_tag params[:controller] %&gt;
    &lt;%= javascript_include_tag "application", "data-turbolinks-track" =&gt; true %&gt;
    &lt;%= javascript_include_tag params[:controller] %&gt;
  &lt;/head&gt;
  </code></pre>