Support --cache-from

[withinboredom]

Docker 1.13 introduces --cache-from ... it would be really cool if a PUSH or TAG would automatically use the same system while building.

ie.

FROM something
RUN xyz
PUSH something/else:latest

The push would tell rocker/docker to cache from something/else:latest when it hits the FROM

[ybogdanov]

Thanks for requesting. Unfortunately, we are discontinuing this project. See the notice here: https://github.com/grammarly/rocker/blob/master/README.md

Closing this issue as we are not able to implement it. Sorry.

[ybogdanov]

And it's a cool idea, by the way :)