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
Thanks…in that case…I will submit a freakin PR for the current README.md that currently only has that 1st sentence…and not the utmost important 2nd sentence !!!