Dockerfile based on Archlinux with `yay` installed

Dockerfile

FROM archlinux

# Need to create a non-root user, otherwise `makepkg` refuses to work
RUN useradd --no-create-home --shell=/bin/false build && usermod -L build
RUN echo "build ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
RUN echo "root ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers

RUN pacman -Syu --noconfirm && pacman -S --noconfirm sudo

USER build
WORKDIR /home/build
RUN sudo pacman -S --needed --noconfirm git base-devel && \
    git clone https://aur.archlinux.org/yay-bin.git && \
    cd yay-bin && \
    makepkg -si --noconfirm