title: Sails.js + PM2 - process.send is undefined
body: <p>I have a <a href="http://sailsjs.com/" rel="nofollow noreferrer">sails.js</a> app. I am using <a href="https://github.com/Unitech/pm2" rel="nofollow noreferrer">pm2</a> in my production environment. According to <a href="https://github.com/Unitech/pm2/issues/2353" rel="nofollow noreferrer">this issue</a>, I need to send a request from <code>sails</code> to <code>pm2</code> indicating the app is online.</p>
  
  <pre><code>module.exports.bootstrap = function(cb) {
      sails.on('lifted', function() {
          process.send('ready') // process.send is undefined
      });
  };
  </code></pre>
  
  <p>How do I trigger the <code>ready</code> event here?</p>