title: How to set-up a docker registry acting as a Proxy?
body: <p>I have a server (let's name it A) which may have access to internet and from which I'm able to pull images from the officiel docker.io registry.</p>
  
  <p>I also have other servers (B, C) which cannot have this same access for security reasons, but are allowed to have access to A.</p>
  
  <p>I also have decided to install a private registry on A, which can be used from B and C.</p>
  
  <p>Is it possible to have this registry acting as a proxy, in the way that when I want to pull an official image from B, it could be done through A ?</p>