anchor.diff:  
   COPY Gemfile Gemfile.lock package.json yarn.lock .yarnclean /mastodon/
   
  -RUN bundle config build.nokogiri --with-iconv-lib=/usr/local/lib --with-iconv-include=/usr/local/include \
  +RUN bundle config build.nokogiri --use-system-libraries --with-iconv-lib=/usr/local/lib --with-iconv-include=/usr/local/include \
    && bundle install -j$(getconf _NPROCESSORS_ONLN) --deployment --without test development \
    && yarn install --pure-lockfile --ignore-engines \
    && yarn cache clean
  
positive.code:     imagemagick \
      libidn \
      libpq \
      protobuf \
      tini \
      tzdata \
  
negative.code:     libidn-dev \
      libressl \
      libtool \
      libxml2-dev \
      libxslt-dev \
      postgresql-dev \
      protobuf-dev \
      python \
  