Dockerfile

FROM python:3.8.3-alpine

    # Install application libs
    RUN apk add --no-cache \
                --update \
        git py3-virtualenv postgresql-client postgresql-dev gcc python3-dev musl-dev openssl

    # Install geolocation libs
    RUN apk add --no-cache \
                --upgrade \
                --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \
        geos \
        proj \
        gdal \
        binutils

    # Install dockerize
    ENV DOCKERIZE_VERSION v0.6.1
    RUN wget \
        https://github.com/jwilder/dockerize/releases/download/$DOCKERIZE_VERSION/dockerize-alpine-linux-amd64-$DOCKERIZE_VERSION.tar.gz \
        && tar -C /usr/local/bin -xzvf dockerize-alpine-linux-amd64-$DOCKERIZE_VERSION.tar.gz \
        && rm dockerize-alpine-linux-amd64-$DOCKERIZE_VERSION.tar.gz

    # Set env vars
    ENV PYTHONUNBUFFERED 1
    ENV VIRTUAL_ENV=/venv
    ENV PATH="$VIRTUAL_ENV/bin:$PATH"

    # Install dependencies in a virtualenv
    # Should you use virtual env in docker: https://vsupalov.com/virtualenv-in-docker/
    # Elegantly activating a virtualenv in a Dockerfile: https://pythonspeed.com/articles/activate-virtualenv-dockerfile/
    COPY requirements.txt code/
    RUN pip install --no-cache-dir --upgrade pip
    RUN pip install --no-cache-dir setuptools --upgrade
    RUN pip install --no-cache-dir -r code/requirements.txt

    # Create user and group
    RUN addgroup --gid 1000 ze-backend
    RUN adduser --uid 1000 --ingroup ze-backend --shell /bin/bash --home "$(pwd)" --disabled-password ze-backend
    USER ze-backend