anchor.diff:  RUN apk update && \
       apk upgrade && \
       apk add \
  -        curl \
  -        nano \
  -        python3 \
           sqlite && \
  -    python3 -m ensurepip && \
  -    rm -r /usr/lib/python*/ensurepip && \
  -    pip3 install --upgrade pip setuptools && \
  -    rm -r /root/.cache && \
  -    curl -sL https://github.com/just-containers/s6-overlay/releases/download/v${S6_VERSION}/s6-overlay-amd64.tar.gz -o /tmp/s6.tgz && \
  -    tar xzf /tmp/s6.tgz -C / && \
  -    rm -f /tmp/s6.tgz && \
       mkdir -p \
           /etc/services.d/hxl \
           /srv/db \
  
positive.code:     rm -rf /root/.cache && \
      rm -rf /var/cache/apk/*
  
  ENTRYPOINT ["/init"]
  
  CMD []
  
negative.code: FROM unocha/alpine-base-s6-python3:latest
  
  WORKDIR /srv/www
  
  