title: Overriding image version in docker-compose file
body: <p>I'm working on overriding default <code>docker-compose.yml</code> file using <code>docker-compose.override.yml</code> as shown in this <a href="https://docs.docker.com/compose/extends/" rel="noreferrer">link</a>, And I can able to specify <code>ports</code> and <code>volumes</code> in the override file. </p>
  
  <p>In the similar way, is it also possible to specify version of the image which needs to be deployed? If no, what is the best way to handle such circumstance where we need to specify different version for the image?</p>
  
  <p>Any help on this would be great.</p>