This repo, together with your docker-datomic-example is great; it does 99% of what I need right now.
But, you didn't expose any way to pass flags into bin/transactor. (e.g. -Xmx)
I was about to spend some time re-learning my Docker fu to do this and send you a PR, but I was just scolded on Slack for yak-shaving.
So, just noting it here as a feature request. Thanks!