anchor.diff:      gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \
     done
   
  -ENV NODE_VERSION 0.12.14
  -ENV NPM_VERSION 2.15.6
  +ENV NODE_VERSION 0.12.15
  +ENV NPM_VERSION 2.15.9
   
   RUN curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-x64.tar.gz" \
       && curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/SHASUMS256.txt.asc" \
  
positive.code: FROM python:2.7.11
  
  # add our user and group first to make sure their IDs get assigned consistently
  RUN groupadd -r freight && useradd -r -m -g freight freight
  
negative.code:     && make -C /usr/src/redis install \
      && rm -r /usr/src/redis
  
  ENV DOCKER_BUCKET get.docker.com
  ENV DOCKER_VERSION 1.11.2
  ENV DOCKER_SHA256 8c2e0c35e3cda11706f54b2d46c2521a6e9026a7b13c7d4b8ae1f3a706fc55e1
  
  RUN set -x \
          && curl -fSL "https://${DOCKER_BUCKET}/builds/Linux/x86_64/docker-$DOCKER_VERSION.tgz" -o docker.tgz \
          && echo "${DOCKER_SHA256} *docker.tgz" | sha256sum -c - \
          && tar -zxvf docker.tgz \
          && mv docker/* /usr/local/bin/ \
          && rmdir docker \
          && rm docker.tgz \
          && docker -v
  
  ENV DOCKER_HOST tcp://docker:2375
  
  