title: Heroku Node.js Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch
body: <p>I found a dozen solutions for Express powered apps with setting port to listen on.
  But I have an app that doesn't use Express and doesn't in fact listens anything.
  And after 60 seconds of it successfully running I get a <code>Error R10 (Boot timeout) -&gt; Web process failed to bind to $PORT within 60 seconds of launch</code> message.
  How I can get around it? Thanks.</p>