Dockerfile

# Build a virtualenv using the appropriate Debian release
# * Install python3-venv for the built-in Python3 venv module (not installed by default)
# * Install gcc libpython3-dev to compile C Python modules
# * In the virtualenv: Update pip setuputils and wheel to support building new packages
#                      Install poetry to facilitate installation of app dependencies
FROM debian:11-slim AS build
ARG POETRY_VERSION=1.1.13
# hadolint ignore=SC1072
RUN apt-get update && \
  apt-get install --no-install-suggests --no-install-recommends --yes python3-venv gcc libpython3-dev && \
  apt-get clean && \
  rm -rf /var/lib/apt/lists/* && \
  python3 -m venv /venv && \
  /venv/bin/pip install --upgrade pip setuptools wheel && \
  /venv/bin/pip install "poetry==${POETRY_VERSION}"

# Build the requirements.txt file as a separate step: Only re-execute this step when pyproject.toml or poetry.lock change
FROM build AS build-venv
COPY pyproject.toml poetry.lock /
RUN /venv/bin/poetry export --with-credentials --format requirements.txt --output /requirements.txt
RUN /venv/bin/pip install --disable-pip-version-check -r /requirements.txt

FROM gcr.io/distroless/python3-debian11 AS runtime
COPY --from=build-venv /venv /venv
WORKDIR /app
COPY ./app ./app
EXPOSE 80
ENTRYPOINT ["/venv/bin/uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "80"]