anchor.diff:           && curl -sL http://deb.nodesource.com/setup_8.x | bash - \
            && cat /etc/apt/sources.list.d/nodesource.list
   
  -RUN         apt-get update && apt-get install -y --no-install-recommends --allow-unauthenticated \
  +RUN         apt-get update && \
  +            # apt-get install --fix-broken && \
  +            apt-get -y dist-upgrade && \
  +            apt-get install -y --no-install-recommends --allow-unauthenticated \
               nodejs \
               yarn \
               #npm \
  
positive.code:             #libyaz-dev \
              gcc-7 \
              g++-7 \
           && rm -rf /var/lib/apt/lists/* \
           && apt-get clean \
           && ls -l /usr/bin/g* \
  
negative.code:          && update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-7 20 \
           && update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 8 \
           && update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-8 8 \
           #&& update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 9 \
           #&& update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-9 9 \
           && gcc --version \
           && g++ --version
  
  