dockerfile

################################################################
# BASE
################################################################
FROM python:3.11.1 as base
# FROM python:3.11.1-slim as base

ENV PYTHONFAULTHANDLER=1 \
    PYTHONHASHSEED=random \
    PYTHONUNBUFFERED=1 \
    # prevents python creating .pyc files
    PYTHONDONTWRITEBYTECODE=1 \
    \
    # pip
    PIP_NO_CACHE_DIR=off \
    PIP_DISABLE_PIP_VERSION_CHECK=on \
    PIP_DEFAULT_TIMEOUT=100 \
    \
    # poetry
    # https://python-poetry.org/docs/configuration/#using-environment-variables
    POETRY_VERSION=1.4.0 \
    # make poetry install to this location
    POETRY_HOME="/opt/poetry" \
    # make poetry create the virtual environment in the project's root
    # it gets named `.venv`
    POETRY_VIRTUALENVS_IN_PROJECT=true \
    # do not ask any interactive question
    POETRY_NO_INTERACTION=1 \
    \
    # paths
    # this is where our requirements + virtual environment will live
    PYSETUP_PATH="/opt/pysetup" \
    VENV_PATH="/opt/pysetup/.venv"

# prepend poetry and venv to path
ENV PATH="$POETRY_HOME/bin:$VENV_PATH/bin:$PATH"

################################################################
# BUILDER
################################################################

FROM base as builder
WORKDIR $PYSETUP_PATH

ENV PIP_DEFAULT_TIMEOUT=100 \
    PIP_DISABLE_PIP_VERSION_CHECK=1 \
    PIP_NO_CACHE_DIR=1 \
    POETRY_VERSION=1.4.0

RUN pip install "poetry==$POETRY_VERSION"

COPY pyproject.toml poetry.lock  ./

RUN poetry config virtualenvs.in-project true && \
    poetry install --only=main --no-root

RUN rm -rf \
    pyproject.toml \
    poetry.lock

################################################################
# PRODUCTION
################################################################

FROM base as final

COPY --from=builder $PYSETUP_PATH $PYSETUP_PATH

WORKDIR app

COPY main.py main.py

CMD ["python3", "main.py"]