title: How to setup Azure CosmosDB trigger in Nodejs
body: <p><br>
  I want to listen to any document update event on my cosmosDB collection, and get the updated document.
  <br>
  I came to know that I can use triggers to accomplish this. But couldn't find a way set this up. <br>
  I believe I can use <code>client.createTriggerAsync</code> to register my trigger.<br>
  But what are correct trigger JSON entries required for this?<br>
  It will be great if someone an share sample JSON to accomplish this.</p>