anchor.diff:      && 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 \
  -    && apt-get clean \
  -    && rm -rf /var/lib/apt/lists/*
  +        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 \
  
positive.code: FROM debian:stretch
  
  MAINTAINER MacArthur Lab
  
  
negative.code: RUN apt-get update \
      && curl -sL https://deb.nodesource.com/setup_8.x | bash - \
      && apt-get install -y \
          nodejs
  
  # install database clients for debugging
  RUN echo 'deb http://apt.postgresql.org/pub/repos/apt/ jessie-pgdg main' >> /etc/apt/sources.list.d/postgresql.list \
      && wget --no-check-certificate -q https://www.postgresql.org/media/keys/ACCC4CF8.asc -O- | apt-key add - \
      && apt-get update && apt-get install -y \
          postgresql \
          postgresql-client \
          libpq-dev
  
  RUN apt-get update && apt-get install -y \
      redis-tools
  
  # install gcloud tools
  RUN CLOUDSDK_CORE_DISABLE_PROMPTS=1 \
      && curl https://sdk.cloud.google.com | bash \
      && apt-get update && apt-get install -y \
          gcc \
          python-dev \
          python-setuptools \
          libffi-dev \
          libssl-dev \
          libpq-dev \
      && pip install gsutil
  
  RUN CLOUDSDK_CORE_DISABLE_PROMPTS=1 \
  