Thank you for adding 9.1.1 support! From the recent release notes:

[Added] Sitecore 9.1.1 XM and XP on ltsc2019/1809, please notice that the xm1 tags is now just xm

Is there any reason for this? Does it make sense to align the naming conventions and rename all the existing xm1 images into xm (or vice versa)?

Currently I'm using docker hub with 20 repositories ($22/month) to build 9.x images. 9.1.1 introduces 3 new xm repos that do not feet my plan and force me to either switch to the next one ($50) or to configure local registry (which I'd like to avoid).

Please let me know if I should come up with a PR fixing this.