chore: install ASDF as root.

Dockerfile

@@ -20,20 +20,12 @@ ENV LANG en_NZ.UTF-8
 ENV LANGUAGE en_NZ:en
 ENV LC_ALL en_NZ.UTF-8
 
-ARG USERNAME=user
-ARG USER_UID=1000
-ARG USER_GID=$USER_UID
-RUN groupadd --gid ${USER_GID} ${USERNAME}
-RUN useradd --shell /usr/bin/zsh --uid ${USER_UID} --gid ${USER_GID} -m ${USERNAME}
-RUN touch /entrypoint.sh && chown ${USERNAME}:${USERNAME} /entrypoint.sh
-
 COPY asdf /usr/local/bin
 RUN chmod 755 /usr/local/bin/asdf
 COPY asdf_install /usr/local/bin
 RUN chmod 755 /usr/local/bin/asdf_install
 
-USER ${USERNAME}
-ENV HOME=/home/${USERNAME}
+ENV HOME=/root
 
 WORKDIR $HOME