title: pm2, node, instances and ports
body: <p>Sorry if this question is to 'newbie' but I can't see how to do it / how it works.</p>
  
  <p>1/ I am creating an API using node.js, API serving some front apps</p>
  
  <p>2/ To get it robust I use pm2 (great product), having nginx as proxy, fine</p>
  
  <p>3/ But how could I handle multiple instance of my node.js api ? I see the 'cluter mode', fine, but what's happening while my node.js is listening on a single port (8080 for instance)  ? If I configure 4 process / instances, they just can't all listen on the same port ah the same time ? ... so : do pm2 dispatch the calls between the instances (so acting as a kind of proxy indeed).</p>
  
  <p>Any clue will be appreciated, how does it work ?</p>
  
  <p>Greg</p>