Just a heads up that AFAIK these Docker images are built on top of the Ubuntu Core ones (which are ~30MB) so this is likely the overhead of multiple Docker laye

Just a heads up that AFAIK these Docker images are built on top of the Ubuntu Core ones (which are ~30MB) so this is likely the overhead of multiple Docker layers that we all know about, see https://github.com/docker-library/repo-info/blob/master/repos/ubuntu/tag-details.md#ubuntudevel https://github.com/docker-library/repo-info/blob/master/repo... as it apparently explains where the core image comes from. Disclaimer: I am a @canonical.com but not involved directly with that so I also +1'ed it :-)