anchor.diff:  # Install terraform to /usr/local/bin
   RUN mkdir -p /tmp/terraform \
     && cd /tmp/terraform \
  -  && wget https://releases.hashicorp.com/terraform/0.6.11/terraform_0.6.11_linux_amd64.zip \
  +  && wget --no-verbose https://releases.hashicorp.com/terraform/0.6.11/terraform_0.6.11_linux_amd64.zip \
     && unzip terraform_0.6.11_linux_amd64.zip \
     && rm terraform*.zip \
     && mv terraform* /usr/local/bin \
  
positive.code:   && rm -rf /var/lib/{apt,dpkg,cache,log}/
  
  # Install docker
  RUN wget -O /tmp/docker.sh https://get.docker.com/ \
    && /bin/sh /tmp/docker.sh \
    && apt-get clean autoclean \
    && apt-get autoremove -y --purge \
  
negative.code: # Install ngrok to /usr/local/bin
  RUN mkdir -p /tmp/ngrok \
    && cd /tmp/ngrok \
    && wget --no-verbose https://dl.ngrok.com/ngrok_2.0.19_linux_amd64.zip \
    && unzip ngrok_2.0.19_linux_amd64.zip \
    && rm ngrok*.zip \
    && mv ngrok /usr/local/bin \
  