title: Automated heroku deploy from subfolder
body: <p>I know you can deploy automatically to heroku from github, but I haven't found a way to only push a subfolder from github to heroku.</p>
  
  <p>From the command-line I know it is possible to do this with:</p>
  
  <pre><code>git subtree push --prefix &lt;subfolder&gt; heroku master
  </code></pre>
  
  <p>However, I would like to know if there is a way to use the github integration with heroku to make it pull a specific subfolder automatically when a commit is added to a branch.</p>