docker-archlinux-aur

This is exactly the same as https://github.com/greyltc/docker-archlinux with the following exception:

Containers based on this one can use the following to install PACKAGE from the AUR:

su docker -c 'pacaur -S --noprogressbar --noedit --noconfirm PACKAGE'

So in your Dockerfile, that would look like:

RUN su docker -c 'pacaur -S --noprogressbar --noedit --noconfirm PACKAGE'