anchor.diff:  
   # setup Re:VIEW
   RUN gem install bundler rake --no-rdoc --no-ri && \
  -    gem install review -v "$REVIEW_VERSION" --no-rdoc --no-ri && \
  -    gem install review-peg -v "$REVIEW_PEG_VERSION" --no-rdoc --no-ri
  +    gem install review -v "$REVIEW_VERSION" --no-rdoc --no-ri
  +#   gem install review-peg -v "$REVIEW_PEG_VERSION" --no-rdoc --no-ri
   
   # install node.js environment
   RUN apt-get update && \
  
positive.code:     npm install -g yarn
  
  # install noto font
  RUN apt-get update && apt-get -y install fonts-noto-cjk-extra
  
  ## install font map of noto for dvipdfmx
  COPY noto-otc/ /usr/share/texlive/texmf-dist/fonts/map/dvipdfmx/ptex-fontmaps/noto-otc/
  
negative.code: FROM debian:buster-slim
  LABEL maintainer="vvakame@gmail.com"
  
  ENV REVIEW_VERSION 3.2.0
  ENV REVIEW_PEG_VERSION 0.2.2
  ENV NODEJS_VERSION 10
  
  