G'day Joey!

I'm in the process of deploying Docker infrastructure via Propellor on both Jessie and Stretch and I've come to discover that Docker.io did not make it into Stretch:

So the below from Docker.hs will fail beyond Jessie:

installed :: Property DebianLike
installed = Apt.installed ["docker.io"]

Before I embarked on my own path to re-implement the above (probably based on How to install Docker engine on Debian 9 Stretch Linux), I thought I'd see what you thought might be the way to resolve this, so that my work could be contributed upstream (if suitable).