bootstrap: Add testing Dockerfile to bootstrap

Added Dockerfile which sets up a simple archlinux test environment for
the dotfiles/bootstrap process/playing around.

Will simply build a simple archlinux machine with a single user.

bootstrap/Dockerfile

@@ -0,0 +1,22 @@
+FROM archlinux:latest
+
+# First build then run this dockerfile with:
+# `podman build -t bootstrap .`
+# `podman run -it -v /path/to/my/dotfiles:/path/to/my/dotfiles:ro bootstrap`
+
+RUN pacman-key --init
+RUN pacman -Syu --noconfirm git vi base-devel sudo zsh man man-pages
+
+RUN useradd -m -G wheel -s /usr/bin/zsh marty
+RUN echo "%wheel    ALL=(ALL:ALL) ALL" >> /etc/sudoers
+RUN echo "marty:password" | chpasswd
+
+# RUN su marty
+# RUN cd /home/marty
+# RUN git clone "https://git.martyoeh.me/Marty/dotfiles" .dotfiles
+# link it directly from dotfile development dir to experiment
+
+USER marty
+VOLUME /home/marty/.dotfiles
+WORKDIR /home/marty/.dotfiles
+CMD ["/usr/bin/bash"]