Dockerfile

#! can parametrize with build-arg
FROM python:3.11-slim-bullseye

# avoid stuck build due to user prompt
ARG DEBIAN_FRONTEND=noninteractive

# ! missing arg (`-y`), 2 layers, no multi-stage
# install dependencies
RUN apt -qq update && apt -qq install -y curl gcc lsof python3-dev
RUN rm -rf /var/lib/apt/lists/*

# pip env vars
ENV PIP_DISABLE_PIP_VERSION_CHECK=on
ENV PIP_DEFAULT_TIMEOUT=100

# poetry env vars
ENV POETRY_HOME="/opt/poetry"
ENV POETRY_VERSION=1.4.2
ENV POETRY_VIRTUALENVS_IN_PROJECT=true
ENV POETRY_NO_INTERACTION=1

# path
ENV VENV="/opt/venv"
ENV PATH="$POETRY_HOME/bin:$VENV/bin:$PATH"

#! extra layer
# working directory (creates dir if it doesn't exist)
RUN mkdir -p /app
WORKDIR /app

# copy all files from current dir to working dir
COPY . .

#! extra layers
# install poetry and dependencies
RUN python -m venv $VENV && . "${VENV}/bin/activate"
RUN python -m pip install "poetry==${POETRY_VERSION}"
RUN poetry install --no-ansi --no-root --without dev

#! hard-coded port
# listening port (not published)
EXPOSE 3000

#! runs as root

# ENTRYPOINT ["python", "main.py"]
ENTRYPOINT ["/bin/sh", "startup.sh"]
CMD ["5000"]                                                #! hard-coded port
# CMD ["gunicorn", "-c", "gunicorn.conf.py", "main:app"]    #! missing poetry call
# CMD ["/bin/bash"]