Dockerfile

ARG PYTHON_TAG

FROM python:${PYTHON_TAG} as base

WORKDIR /workspace

RUN apt-get update \
    && apt-get install -y --no-install-recommends build-essential libpq-dev  \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/* \
    && rm -rf /tmp/downloaded_packages

FROM base as builder

ENV POETRY_NO_INTERACTION=1 \
    POETRY_VIRTUALENVS_IN_PROJECT=1 \
    POETRY_VIRTUALENVS_CREATE=1 \
    POETRY_CACHE_DIR=/tmp/poetry_cache \
    PATH="/root/.local/bin:$PATH"

COPY pyproject.toml poetry.lock ./

RUN curl -sSL https://install.python-poetry.org | python3 -\
    && poetry install --no-root \
    && rm -rf $POETRY_CACHE_DIR \
    && curl -sSL https://install.python-poetry.org | python3 - --uninstall

FROM base as runtime

ENV VIRTUAL_ENV=/workspace/.venv \
    PATH="/workspace/.venv/bin:$PATH"

COPY --from=builder ${VIRTUAL_ENV} ${VIRTUAL_ENV}