title: How to use pm2 to start node app?
body: <p>I'm new to node.js and want to deploy an app on the serve. currently the app runs when run <code>node start</code>. </p>
  
  <p>I'm wondering how can I make it to run like an upstart process using <code>pm2</code>.</p>
  
  <p>In tutorials that I've seen pm2 is used to run a file like <code>index.js</code>. but when I use <code>pm2 node start</code> the app process does not start
  Appreciate your help to fix this? </p>