chore: Add basic ASDF container.

Dockerfile

@@ -0,0 +1,52 @@
+FROM ubuntu:latest
+
+ENV DEBIAN_FRONTEND="noninteractive"
+
+# Install basic dependencies
+RUN apt-get -q -y update && \
+  apt-get -q -y --no-install-recommends install autoconf automake \
+  bash build-essential bzip2 ca-certificates curl dpkg-dev file \
+  g++ gcc git-core imagemagick libbz2-dev libc6-dev libdb-dev libevent-dev \
+  libffi-dev libgdbm-dev libglib2.0-dev libgmp-dev libjpeg-dev libkrb5-dev \
+  liblzma-dev libmagickcore-dev libmagickwand-dev libmaxminddb-dev \
+  libncurses-dev libncurses5-dev libncursesw5-dev libpng-dev libpq-dev \
+  libreadline-dev libsctp-dev libsqlite3-dev libssl-dev libtool libwebp-dev \
+  libxml2-dev libxslt-dev libyaml-dev locales make make mercurial patch python3 \
+  unixodbc-dev unzip wget xz-utils zlib1g-dev zsh gnupg inotify-tools less \
+  postgresql-client ssh direnv && apt-get -q -y clean
+
+RUN locale-gen en_AU.UTF-8
+ENV LANG en_AU.UTF-8
+ENV LANGUAGE en_AU:en
+ENV LC_ALL en_AU.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
+RUN mkdir -p /var/tmp/history && chown -R ${USERNAME}:${USERNAME} /var/tmp/history
+
+USER ${USERNAME}
+ENV HOME=/home/${USERNAME}
+
+WORKDIR $HOME
+
+# Install ASDF
+ARG ASDF_VERSION=0.10.2
+RUN git clone https://github.com/asdf-vm/asdf.git ~/.asdf --branch v${ASDF_VERSION} && \
+  echo '\nsource $HOME/.asdf/asdf.sh' >> ~/.bashrc && \
+  echo '\nsource $HOME/.asdf/asdf.sh' >> ~/.zshrc
+
+# Generate an entrypoint.sh
+RUN echo '#!/bin/bash' > /entrypoint.sh && \
+  echo 'source ~/.asdf/asdf.sh' >> /entrypoint.sh && \
+  echo 'eval "$(direnv hook bash)"' >>  /entrypoint.sh && \
+  echo 'exec "$@"' >> /entrypoint.sh && \
+  chmod 755 /entrypoint.sh
+
+ENTRYPOINT [ "/entrypoint.sh" ]
+
+CMD ["zsh"]
+