title: How do I get just the app id with PM2?
body: <p>Say I have an app named "fizzbuzz". I start it with <code>pm2 start index.js --name="fizzbuzz" --watch</code>. For automation purposes I'd like to just get the id of the app. I can grep it I guess but it seems like something that PM2 would have out of the box. I can't find it in the docs. For instance, I'd like to do this: </p>
  
  <pre><code>$ pm2 id --name="fizzbuzz"
  3
  </code></pre>
  
  <p>Will I have to use grep and string manipulation in bash to accomplish this? </p>