anchor.diff:      && apt-get update && apt-get install -y \
           gcc \
           libpq-dev \
  +    && apt-get clean \
  +    && rm -rf /var/lib/apt/lists/* \
       && pip install gsutil
   
   RUN CLOUDSDK_CORE_DISABLE_PROMPTS=1 \
  
positive.code:     && echo "deb http://packages.cloud.google.com/apt $CLOUD_SDK_REPO main" > /etc/apt/sources.list.d/google-cloud-sdk.list \
      && curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add - \
      && apt-get update && apt-get install -y \
          google-cloud-sdk
  
  RUN curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl \
      && chmod +x ./kubectl \
  
negative.code:     && apt-get update && apt-get install -y \
          postgresql \
          postgresql-client \
          libpq-dev \
      && apt-get clean \
      && rm -rf /var/lib/apt/lists/*
  
  RUN apt-get update && apt-get install -y \
      redis-tools \
      && apt-get clean \
      && rm -rf /var/lib/apt/lists/*
  
  # install gcloud tools
  RUN CLOUDSDK_CORE_DISABLE_PROMPTS=1 \
  