title: How do you programmatically set MONGO_URL?
body: <p>How do I set MONGO_URL from within my Meteor app?</p>
  
  <p>I tried</p>
  
  <pre><code>process.env.MONGO_URL = '...'
  </code></pre>
  
  <p>in my server-side code, outside Meteor.startup, but that isn't working.</p>
  
  <p>I'm using demeteorizer to bundle it into a node.js app. I can't set MONGO_URL in Terminal directly (I'm running my app on a third-party provider).</p>