anchor.diff:  
   RUN apk update && apk --update add tar && apk add curl && curl -fsSLO https://get.docker.com/builds/Linux/x86_64/docker-17.05.0-ce.tgz && tar --strip-components=1 -xvzf docker-17.05.0-ce.tgz -C /usr/local/bin && rm -rf docker-*
   # install git, curl, ssh, bash
  -RUN apk update && apk add git curl openssh bash
  +RUN apk update && apk add git curl openssh bash tini
   
   # install docker compose and other python deps
   RUN apk update && apk add py-pip perl && pip install docker-compose==1.13.0 docopt==0.6.2 pyyaml==3.11
  
positive.code: COPY start.sh /usr/local/bin/start.sh
  RUN chmod 755 /usr/local/bin/start.sh
  
  ENTRYPOINT ["/usr/local/bin/start.sh"]
  
negative.code: FROM openjdk:8u151-jdk-alpine
  
  ENV JENKINS_SWARM_VERSION 2.0
  ENV JAVA_HOME /usr/lib/jvm/java-1.8-openjdk
  