Dockerfile.prod

############## 
# temp stage #
############## 

FROM python:3.11.4-slim-buster as builder

WORKDIR /app

ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1

# system deps
RUN apt-get update && apt-get install -y --no-install-recommends gcc

# lint
RUN pip install --upgrade pip
RUN pip install flake8==6.0.0
COPY . .
RUN flake8 --ignore=E501,F401 .

# python deps
COPY requirements.txt .
RUN pip wheel --no-cache-dir --no-deps --wheel-dir /app/wheels -r requirements.txt

###############
# final stage #
############### 

FROM python:3.11.4-slim-buster

WORKDIR /app

# system and python deps
RUN apt-get update && apt-get install -y --no-install-recommends netcat
COPY --from=builder /app/wheels /wheels
COPY --from=builder /app/requirements.txt .
RUN pip install --upgrade pip
RUN pip install --no-cache /wheels/*

COPY ./entrypoint.prod.sh .
RUN sed -i 's/\r$//g' ./entrypoint.prod.sh
RUN chmod +x ./entrypoint.prod.sh

COPY . .

RUN addgroup --gid 1001 --system app && \
    adduser --no-create-home --shell /bin/false --disabled-password --uid 1001 --system --group app
RUN chown -R app:app .

USER app
RUN mkdir /app/staticfiles

HEALTHCHECK CMD curl --fail http://localhost:8000 || exit 1

ENTRYPOINT ["./entrypoint.prod.sh"]

# TODO: Cache Python Packages to the Docker Host
# TODO: only COPY what is needed
# TODO: add envars via --mount=type=secret
# TODO: combine Dockerfiles into one and use flag or envar to switch
# TODO: update dockerfile.json snippet
# TODO: use docker scan before deployment