title: mup and meteor resolving the url
body: <p>In my mup settings I have</p>
  
  <pre><code>  "env": {
       "ROOT_URL": "http://localhost",
        "PORT": 3000,
        "UPSTART_UID" : "meteoruser",
        "MAIL_URL": "smtp://username:password@smtp.sendgrid.net:587",
        "METEOR_ENV": "production"
     },
  </code></pre>
  
  <p>I am following this.</p>
  
  <p><a href="http://johngibby.com/blog/How_to_deploy_your_meteor.js_app_on_Digital_Ocean" rel="nofollow">http://johngibby.com/blog/How_to_deploy_your_meteor.js_app_on_Digital_Ocean</a></p>
  
  <p>Should the port be 3000 or 80 and should the URL be my url? </p>