See more about how this Docker base image is used in this blogpost: https://gergely.imreh.net/blog/2018/04/circleci-aur/
The image is is deployed to imrehg/archlinux-makepkg
on Docker Hub.
My own additions (on top of the upstream ArchLinux image) are released under
Apache 2.0 licence (if applicable), see the LICENSE
file of this repo.