anchor.diff:  ENV RAILS_SERVE_STATIC_FILES=true \
       RAILS_ENV=production NODE_ENV=production
   
  +ARG YARN_VERSION=1.3.2
  +ARG YARN_DOWNLOAD_SHA256=6cfe82e530ef0837212f13e45c1565ba53f5199eec2527b85ecbcd88bf26821d
   ARG LIBICONV_VERSION=1.15
   ARG LIBICONV_DOWNLOAD_SHA256=ccf536620a45458d26ba83887a983b96827001e92a13847b45e4925cc8913178
   
  
positive.code:     ca-certificates \
      ffmpeg \
      file \
      icu-libs \
      imagemagick \
      libidn \
      libpq \
      nodejs \
      protobuf \
      tini \
      tzdata \
      yarn \
   && update-ca-certificates \
   && mkdir -p /tmp/src \
   && wget -O libiconv.tar.gz "https://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 \
  
negative.code: FROM ruby:2.4.3-alpine3.6
  
  LABEL maintainer="https://github.com/tootsuite/mastodon" \
        description="Your self-hosted, globally interconnected microblogging community"
  