anchor.diff:  ENV UID=991 GID=991 \
       RAILS_SERVE_STATIC_FILES=true \
       RAILS_ENV=production NODE_ENV=production
  +
  +ARG LIBICONV_VERSION=1.15
  +ARG LIBICONV_DOWNLOAD_SHA256=ccf536620a45458d26ba83887a983b96827001e92a13847b45e4925cc8913178
   
   EXPOSE 3000 4000
   
  
positive.code:     imagemagick@edge \
      libidn \
      libpq \
      libxml2 \
      libxslt \
      nodejs-npm@edge \
      nodejs@edge \
      protobuf \
  
negative.code:     tini \
      yarn@edge \
   && update-ca-certificates \
   && 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 - \
   && mkdir -p /tmp/src \
   && tar -xzf libiconv.tar.gz -C /tmp/src \
   && rm libiconv.tar.gz \
   && cd /tmp/src/libiconv-$LIBICONV_VERSION \
   && ./configure --prefix=/usr/local \
   && make \
   && make install \
   && libtool --finish /usr/local/lib \
   && cd /mastodon \
   && rm -rf /tmp/* /var/cache/apk/*
  
  COPY Gemfile Gemfile.lock package.json yarn.lock /mastodon/
  
  RUN bundle config build.nokogiri --with-iconv-lib=/usr/local/lib --with-iconv-include=/usr/local/include \
   && bundle install --deployment --without test development \
   && yarn --ignore-optional --pure-lockfile
  
  COPY . /mastodon
  