Dockerfile

# define an alias for the specific python version used in this file.
FROM python:3.11.3-slim-bullseye as python

# Python build stage
FROM python as python-build-stage

ARG BUILD_ENVIRONMENT=production

# Install apt packages
RUN apt-get update && apt-get install --no-install-recommends -y build-essential libpq-dev
COPY ./requirements .
RUN pip wheel --wheel-dir /usr/src/app/wheels -r ${BUILD_ENVIRONMENT}.txt


# Python 'run' stage
FROM python as python-run-stage

ARG BUILD_ENVIRONMENT=production
ARG APP_HOME=/app

ENV PYTHONUNBUFFERED 1
ENV PYTHONDONTWRITEBYTECODE 1
ENV BUILD_ENV ${BUILD_ENVIRONMENT}

WORKDIR ${APP_HOME}

RUN addgroup --system django && adduser --system --ingroup django django

# Install required system dependencies
RUN apt-get update && apt-get install --no-install-recommends -y libpq-dev gettext \
  # cleaning up unused files
  && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
  && rm -rf /var/lib/apt/lists/*

# All absolute dir copies ignore workdir instruction. All relative dir copies are wrt to the workdir instruction
# copy python dependency wheels from python-build-stage
COPY --from=python-build-stage /usr/src/app/wheels  /wheels/

# use wheels to install python dependencies
RUN pip install --no-cache-dir --no-index --find-links=/wheels/ /wheels/* \
  && rm -rf /wheels/


COPY --chown=django:django ./compose/production/cartable/start /start
RUN sed -i 's/\r$//g' /start
RUN chmod +x /start


# copy application code to WORKDIR
COPY --chown=django:django . ${APP_HOME}

# make django owner of the WORKDIR directory as well.
RUN chown django:django ${APP_HOME}
WORKDIR ${APP_HOME}/core

USER django

CMD ["/start"]