title: How to run 'ionic serve' in global WEB?
body: <p>I'm new in Ionic Framework, so I need your help. When I'm running <code>ionic serve</code> on localhost everything is great. But now I'm trying to work with <a href="http://c9.io" rel="nofollow">Cloud9</a>, it prints:</p>
  
  <pre><code>The port 8100 was taken on the host 172.17.12.3 - using port 8101 instead
  The port 35729 was taken on the host 172.17.12.3 - using port 35730 instead
  Running live reload server: http://172.17.12.3:35730
  Watching : [ 'www/**/*', '!www/lib/**/*' ]
  Running dev server: http://172.17.12.3:8101
  </code></pre>
  
  <p>But this adresses don't work at all. And i get an error from Cloud9:</p>
  
  <pre><code>Error: you may be using the wrong PORT &amp; IP for your server app. Try passing $PORT and $IP to properly launch your application.
  </code></pre>
  
  <p>So how can I set $PORT and $IP in Ionic?</p>