Dockerfile

FROM python:3.8-slim as base

# Setup env
ENV LANG C.UTF-8
ENV LC_ALL C.UTF-8
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONFAULTHANDLER 1


FROM base AS python-deps

# Install pipenv and compilation dependencies
RUN pip install pipenv
RUN apt-get update && apt-get install -y --no-install-recommends gcc
ADD http://archive.ubuntu.com/ubuntu/pool/main/u/ubuntu-keyring/ubuntu-keyring_2021.03.26.tar.gz /tmp/
RUN tar xvzf /tmp/ubuntu-keyring_2021.03.26.tar.gz -C /tmp/

# Install python dependencies in /.venv
COPY Pipfile .
COPY Pipfile.lock .
RUN PIPENV_VENV_IN_PROJECT=1 pipenv install --deploy

FROM python-deps as tests

RUN PIPENV_VENV_IN_PROJECT=1 pipenv install --deploy --dev

COPY . .
RUN pipenv run pytest tests/
RUN touch /tmp/tests

FROM base AS runtime

RUN apt-get update && apt-get install -y gpg

# Copy virtual env from python-deps stage
COPY --from=python-deps /.venv /.venv
ENV PATH="/.venv/bin:$PATH"


COPY --from=python-deps /tmp/ubuntu-keyring-2021.03.26/keyrings/* /usr/share/keyrings/
COPY --from=tests /tmp/tests /tmp/

# Create and switch to a new user
RUN useradd --create-home appuser
WORKDIR /home/appuser
USER appuser

# Install application into container
COPY . .

EXPOSE 5000

# Run the application
ENTRYPOINT ["python", "handler.py"]