python3.6 on alpine with pipenv

Dockerfile

FROM alpine:3.10

# Install runtime libs
RUN apk add python3=3.6.8-r2 \
    libpq \
    libjpeg-turbo

# Enable non buffered output into tty
ENV PYTHONUNBUFFERED 1
# Set default lang
ENV LANG C.UTF-8

WORKDIR /app/

COPY Pipfile Pipfile.lock /app/

RUN apk --update --virtual build-deps \         # update index and use virtual deps
    add py3-pip \                               # pip3 
    python3-dev=3.6.8-r2 \                      # python3.6 with .c headers
    build-base \                                # gcc + musl-dev(lib-c implementation)
    postgresql-dev \                            # postgres lib 
    jpeg-dev zlib-dev \                         # pillow deps 
    && pip3 install pipenv \                    
    && pipenv install --system --deploy \       # install into system
    && apk del build-deps \                     # delete virtual deps (remove gcc, libc, etc)
    && rm -rf /root/.cache/*                    # remove pip and pipenv cache
   
COPY . /app


ENTRYPOINT ["sh", "docker-entrypoint.sh"]