anchor.diff:  
   RUN bundle config build.nokogiri --with-iconv-lib=/usr/local/lib --with-iconv-include=/usr/local/include \
    && bundle install -j$(getconf _NPROCESSORS_ONLN) --deployment --without test development \
  - && yarn --ignore-optional --pure-lockfile
  + && yarn --pure-lockfile
   
   COPY . /mastodon
   
  
positive.code:     build-base \
      icu-dev \
      libidn-dev \
      libtool \
      postgresql-dev \
      protobuf-dev \
  
negative.code:     imagemagick \
      libidn \
      libpq \
      nodejs \
      nodejs-npm \
      protobuf \
      su-exec \
      tini \
   && update-ca-certificates \
   && mkdir -p /tmp/src /opt \
   && wget -O yarn.tar.gz "https://github.com/yarnpkg/yarn/releases/download/v$YARN_VERSION/yarn-v$YARN_VERSION.tar.gz" \
   && echo "$YARN_DOWNLOAD_SHA256 *yarn.tar.gz" | sha256sum -c - \
   && tar -xzf yarn.tar.gz -C /tmp/src \
   && rm yarn.tar.gz \
   && mv /tmp/src/yarn-v$YARN_VERSION /opt/yarn \
   && ln -s /opt/yarn/bin/yarn /usr/local/bin/yarn \
   && wget -O libiconv.tar.gz "http://ftp.gnu.org/pub/gnu/libiconv/libiconv-$LIBICONV_VERSION.tar.gz" \
   && echo "$LIBICONV_DOWNLOAD_SHA256 *libiconv.tar.gz" | sha256sum -c - \
   && tar -xzf libiconv.tar.gz -C /tmp/src \
   && rm libiconv.tar.gz \
   && cd /tmp/src/libiconv-$LIBICONV_VERSION \
  