title: Docker - check private registry image version
body: <p>What CLI commands do I need to use in order to check if the image in my <a href="https://registry.hub.docker.com/_/registry/">private docker registry</a> is a newer version than the one currently running on my server?</p>
  
  <p>E.g. I have a container that I ran using <code>docker run -d my.domain.com:5000/project1</code></p>
  
  <p>and I would like to know if it is out-of-date.</p>