anchor.diff:            gcc \
             python3-dev \
             musl-dev \
  +          # for numpy
  +          linux-headers \
  +          g++ \
  +          # end for numpy
             postgresql-dev \
             curl \
  +          git \
       \
       # install pykafka
       && apk add --no-cache --repository http://dl-cdn.alpinelinux.org/alpine/edge/main/ \
  
positive.code:     # install flask
      && pip install flask \
      \
      # delete build dependencies
      && apk del .build-deps \
      && apk del .librdkafka \
  
negative.code:             librdkafka-dev \
      && pip install pykafka \
      \
      # install scientific
      && ln -s /usr/include/locale.h /usr/include/xlocale.h \
      && pip install numpy \
      \
      # install avro
      && pip install avro_python3 \
      \
  