Thad, there is no docker image for galaxy. I'll paste a response that I saw
the other day:

The docker image was intended to be used by the installer. Since the
release of 3.0, the installer no longer works and has been removed form the
`devel` branch. If you want to run Galaxy locally, follow the contributing
guide: https://github.com/ansible/galaxy/blob/devel/CONTRIBUTING.rst

On Thu, Nov 8, 2018 at 4:32 PM Jonathan Lozada De La Matta <
[EMAIL PROTECTED]> wrote:
--
Matt Martz
@sivel
sivel.net

--
To post to this group, send email to [EMAIL PROTECTED].