anchor.diff:  RUN git clone https://github.com/yegor256/rultor.git && \
     cd rultor && \
     gem install jekyll && \
  -  mvn clean install site -Pqulice -Psite && \
  +  mvn clean install -Pqulice && \
     cd .. && \
     rm -rf rultor
   
  
positive.code: ENV LANG en_US.UTF-8
  ENV LANGUAGE en_US.UTF-8
  
  # Basic tools
  RUN apt-get update
  RUN apt-get install -y wget bcrypt curl
  RUN apt-get install -y unzip zip
  
negative.code: RUN apt-get install -y build-essential
  RUN apt-get install -y automake autoconf
  
  # SSH Daemon
  RUN apt-get install -y ssh && \
    mkdir /var/run/sshd && \
    chmod 0755 /var/run/sshd
  