title: Email Notification when google docs were updated
body: <p>I am creating a web-based tool that will serve as repository of all google docs of the operations. Is there a way that an email notification can be triggered when a file is updated?</p>
  
  <p>I didn't try anything yet as I have no idea how it will works in google script. The only idea that I have is to put a trigger code in each file but this will not be applicable for the users. </p>
  
  <p>N/A</p>
  
  <p>The expected result should be any google docs that will be updated will trigger a notification email to all users.</p>