simple.Dockerfile

FROM python:3-slim as prod_base
WORKDIR /app
ENV PYTHONUNBUFFERED True
COPY requirements.txt .
RUN pip install -r requirements.txt

FROM prod_base as test_base
COPY test-requirements.txt .
RUN pip install -r test-requirements.txt

FROM prod_base as prod
COPY src/ .
ARG version=unknown
RUN echo $version && sed -i "s/##VERSION##/$version/g" __init__.py

FROM test_base as test
COPY src/ .
COPY test ./test
COPY fixtures /fixtures
COPY specs /specs
COPY config /config
ARG version=unknown
RUN echo $version && sed -i "s/##VERSION##/$version-dev/g" __init__.py

FROM prod