I ran into some dependency issues(needed to install ansible-collection-community-docker on my fedora workstation), but after that it ran fine and installed everything first run. I made some adjustments to the inventory config afterwards, but aside from that it just worked.
Might want to create a git repo for this (maybe other themes) and get it converted to a full fledged theme for lemmy. I tacked your changes onto the end of the darkly-red theme and seems to look nice. I was just too lazy to remove the bits from the original theme. A git repo would be good though since a lot of the responses suggest coming back for updates. Git will let people know if there is a change and they can see what they are as they change.