Dockerfile

ARG TAG=3.10-slim
FROM python:${TAG}

ARG CONTAINER_USER="python"
ARG LANGUAGE_CODE="en"
ARG COUNTRY_CODE="GB"
ARG ENCODING="UTF-8"
ARG LOCALE_STRING="${LANGUAGE_CODE}_${COUNTRY_CODE}"
ARG LOCALIZATION="${LOCALE_STRING}.${ENCODING}"
ARG OH_MY_ZSH_THEME="bira"

RUN apt-get update && apt-get -y upgrade && \
    apt-get -y install --no-install-recommends \
        locales git curl inotify-tools zsh && \
    echo "${LOCALIZATION} ${ENCODING}" > /etc/locale.gen && \
    locale-gen "${LOCALIZATION}" && \
    useradd -m -u 1000 -s /usr/bin/zsh "${CONTAINER_USER}" && \
    CHSH=no RUNZSH=no KEEP_ZSHRC=yes sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)" && \
    cp -v /root/.zshrc /home/${CONTAINER_USER}/.zshrc && \
    cp -rv /root/.oh-my-zsh /home/${CONTAINER_USER}/.oh-my-zsh && \
    sed -i "s#/root#/home/${CONTAINER_USER}#g" /home/${CONTAINER_USER}/.zshrc && \
    sed -i s/ZSH_THEME=\"robbyrussell\"/ZSH_THEME=\"${OH_MY_ZSH_THEME}\"/g /home/${CONTAINER_USER}/.zshrc && \
    mkdir -p /home/${CONTAINER_USER}/workspace && \
    chown -R ${CONTAINER_USER}:${CONTAINER_USER} /home/${CONTAINER_USER}

USER ${CONTAINER_USER}
ENV USER=${CONTAINER_USER}
ENV LANG=${LOCALIZATION}
ENV LANGUAGE=${LOCALE_STRING}:${LANGUAGE_CODE}
ENV PATH=/home/${CONTAINER_USER}/.local/bin:${PATH}
ENV LC_ALL=${LOCALIZATION}

# work in the same place you mount in compose
WORKDIR /home/${CONTAINER_USER}/workspace

# install deps; we only copy requirements, code is bind-mounted
ADD ./server/requirements.txt /tmp/requirements.txt
RUN pip3 install --no-cache-dir -r /tmp/requirements.txt && \
    pip3 install --no-cache-dir virtualenv

CMD ["zsh"]