title: Remove herokuapp sub domain
body: <p>I`m developing some apps and hosting them on heroku</p>
  
  <p>there is a problem which is indexing the website</p>
  
  <p>if i publish it with top level domain there will be conflict between the heroku sub domain and the main one, search engines will index both</p>
  
  <p>for example if my domain is      </p>
  
  <pre><code> something.com      
  </code></pre>
  
  <p>and heroku sub domain is </p>
  
  <pre><code>something.herokuapp.com
  </code></pre>
  
  <p>what should i do to delete heroku sub domain and make it only visible on main one?</p>
  
  <p>Thank you</p>