I never got there. I found Docker very difficult to get on with (without having previous container experience). I've since been back, and I can create the container, but I've not managed to understand how to use Docker Compose to connect together the parts.
A lot of the PRs suggested on github only factored for the personal install of jsbin, whereas I actually needed it for production, where I've got memcached, mysql and a host of other services connecting in.
So...one day.
That said, I do have the Docker beta app for the mac which removes all the weird setup required on the Mac, and it makes it a lot easier to work with Docker (which I've tried a few times to replicate bugs that I've seen in my Travis tests).