One thing they don't talk about is using non-docker tools to build images. e.g. nix: http://lethalman.blogspot.com/2016/04/cheap-docker-images-with-nix_15.html

One thing they don't talk about is using non-docker tools to build images. e.g. nix: http://lethalman.blogspot.com/2016/04/cheap-docker-images-with-nix_15.html http://lethalman.blogspot.com/2016/04/cheap-docker-images-wi... or jib: https://github.com/GoogleContainerTools/jib https://github.com/GoogleContainerTools/jib These may not fit every use case, but they can minimize the size of the image by making really precisely defined containers.