title: Docker hanging on "Extracting"
body: <p>On my local Macbook I can pull and build a particular Postgres container without issue.  However, on an Azure VM running Ubuntu 16.04 it hangs on "Extracting" until finally my ssh connection is closed.  How can I best diagnose this or what may be happening to cause this?</p>
  
  <p><a href="https://i.stack.imgur.com/iSnQG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/iSnQG.png" alt="enter image description here"></a></p>