anchor.diff:      RAILS_SERVE_STATIC_FILES=true \
       RAILS_ENV=production NODE_ENV=production
   
  +ARG YARN_VERSION=1.1.0
  +ARG YARN_DOWNLOAD_SHA256=171c1f9ee93c488c0d774ac6e9c72649047c3f896277d88d0f805266519430f3
   ARG LIBICONV_VERSION=1.15
   ARG LIBICONV_DOWNLOAD_SHA256=ccf536620a45458d26ba83887a983b96827001e92a13847b45e4925cc8913178
   
  
positive.code:     imagemagick \
      libidn \
      libpq \
      nodejs-npm \
      nodejs \
      protobuf \
      su-exec \
      tini \
      yarn \
   && 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 \
  
negative.code:     build-base \
      icu-dev \
      libidn-dev \
      libressl \
      libtool \
      postgresql-dev \
      protobuf-dev \
  