anchor.diff:      && rm "node-v$NODE_VERSION-linux-x64.tar.xz" SHASUMS256.txt.asc SHASUMS256.txt \
       && ln -s /usr/local/bin/node /usr/local/bin/nodejs \
       && npm install -g npm@$NPM_VERSION \
  -    && npm cache clear \
       && rm -rf /tmp/npm-*
   
   # Install Node global dependencies
  
positive.code:         build-essential \
          curl \
          optipng \
      && apt-get clean \
      && apt-get autoremove -y
  
  
negative.code:     done
  
  ENV NPM_CONFIG_LOGLEVEL info
  ENV NODE_VERSION 10.15.0
  ENV NPM_VERSION 6
  
  RUN curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-x64.tar.xz" \
      && curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/SHASUMS256.txt.asc" \
  