anchor.diff:          &&  cp -vrf dist/ /frontend/ \
           &&  rm -rfv /app/frontend
   
  -RUN         npm cache clear \
  -        &&  apk del nodejs \
  -        nodejs-npm
  +RUN         npm cache clear --force \
  +        &&  apk del \
  +                    nodejs \
  +                    nodejs-npm
   
   # installing main Python module to system
   RUN         cd /app \
  -&&  pip install .
  +        &&  pip install .
   
   # copy containers's startup files
   COPY        root/ /
  
positive.code: 
  USER        root
  # clean up
  RUN         apk del python3-dev \
                  make \
                  gcc \
                  curl \
                  linux-headers \
                  musl-dev \
                  nodejs  \
          &&  rm  -rf \
                  /root/.cache \
                  /tmp/*
  
  # Docker configuration
  EXPOSE      8086
  VOLUME      /config /animes /movies /tv
  
negative.code: 
  # build frontend
  RUN         apk add --no-cache --update \
                      nodejs \
                      nodejs-npm \
          &&  npm install -g npm@5
  
  RUN         cd /app/frontend \
          &&  make dev \
  