Build docker image for python app based on pipenv development

Dockerfile

FROM python:3.8-alpine AS base

FROM base as builder

RUN apk update && \
    apk add py-pip && \
    pip install pipenv

# Update pipenv libs
COPY Pipfile* ./
RUN PIPENV_VENV_IN_PROJECT=1 pipenv install --deploy

FROM base as runner

# Python libs and sources
COPY --from=builder /.venv/lib/python3.8/site-packages /usr/local/lib/python3.8/site-packages
COPY main.py .

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