anchor.diff:  ARG DOCKER_VERSION=19.03.8
   ARG PYTHON_VERSION=3.7.7
   ARG BUILD_ALPINE_VERSION=3.11
  +ARG BUILD_CENTOS_VERSION=7
   ARG BUILD_DEBIAN_VERSION=slim-stretch
   ARG RUNTIME_ALPINE_VERSION=3.11.5
  +ARG RUNTIME_CENTOS_VERSION=7
   ARG RUNTIME_DEBIAN_VERSION=stretch-20200414-slim
   
   ARG DISTRO=alpine
  
positive.code: 
  FROM alpine:${RUNTIME_ALPINE_VERSION} AS runtime-alpine
  FROM debian:${RUNTIME_DEBIAN_VERSION} AS runtime-debian
  FROM runtime-${DISTRO} AS runtime
  COPY docker-compose-entrypoint.sh /usr/local/bin/
  ENTRYPOINT ["sh", "/usr/local/bin/docker-compose-entrypoint.sh"]
  
negative.code:     openssl \
      zlib1g-dev
  
  FROM centos:${BUILD_CENTOS_VERSION} AS build-centos
  RUN yum install -y \
      gcc \
      git \
      libffi-devel \
      make \
      openssl \
      openssl-devel
  WORKDIR /tmp/python3/
  ARG PYTHON_VERSION
  RUN curl -L https://www.python.org/ftp/python/${PYTHON_VERSION}/Python-${PYTHON_VERSION}.tgz | tar xzf - \
      && cd Python-${PYTHON_VERSION} \
      && ./configure --enable-optimizations --enable-shared --prefix=/usr LDFLAGS="-Wl,-rpath /usr/lib" \
      && make altinstall
  RUN alternatives --install /usr/bin/python python /usr/bin/python2.7 50
  RUN alternatives --install /usr/bin/python python /usr/bin/python3.7 60
  RUN curl https://bootstrap.pypa.io/get-pip.py | python -
  
  FROM build-${DISTRO} AS build
  ENTRYPOINT ["sh", "/usr/local/bin/docker-compose-entrypoint.sh"]
  WORKDIR /code/
  