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