title: Run Ruby Script after Build on Heroku
body: <p>I have a rails app running on Heroku.  I have it set to watch a branch on Github so that it automatically 'builds' and updates when I push a commit to that branch.  Awesome.</p>
  
  <p>I have a file in my repo <code>scripts/dostuff.rb</code>.</p>
  
  <p>I want Heroku to fire off that script each time it 'builds' my rails app.</p>
  
  <p>Google is not my friend with this one.  How can I have my <code>dostuff.rb</code> script automatically run each time Heroku re-deploys my app?</p>