title: node/express: set NODE_ENV when using Forever to run script continuously
body: <p>How can I set the <a href="http://expressjs.com/guide.html#configuration" rel="nofollow noreferrer">NODE_ENV</a> variable/parameter to "production" when I'm using <a href="https://github.com/indexzero/forever" rel="nofollow noreferrer">forever</a> to start my node script</p>
  
  <p>I got this so far:</p>
  
  <pre><code>forever start -l forever.log -o out.log -e err.log -a app.js
  </code></pre>