title: Is it possible to cache multi-stage docker builds?
body: <p>I recently switched to multi-stage docker builds, and it doesn't appear that there's any caching on intermediate builds.  I'm not sure if this is a docker limitation, something which just isn't available or whether I'm doing something wrong.</p>
  
  <p>I am pulling down the final build and doing a --cache-from at the start of the new build, but it always runs the full build.</p>