anchor.diff:  ENV DNSCRYPT_WRAPPER_VERSION 0.2
   ENV DNSCRYPT_WRAPPER_SHA256 d26f9d6329653b71bed5978885385b45f16596021f219f46e49da60d5813054e
   ENV DNSCRYPT_WRAPPER_DOWNLOAD_URL https://github.com/Cofyc/dnscrypt-wrapper/releases/download/v${DNSCRYPT_WRAPPER_VERSION}/dnscrypt-wrapper-v${DNSCRYPT_WRAPPER_VERSION}.tar.bz2
  +ENV DNSCRYPT_WRAPPER_USER dnscrypt-wrapper
  +ENV DNSCRYPT_WRAPPER_KEYS /opt/dnscrypt-wrapper/etc/keys
   
   RUN set -x && \
       apt-get update && \
  
positive.code:     ./configure --prefix=/opt/dnscrypt-wrapper --with-sodium=/opt/libsodium && \
      make install && \
      mkdir -p /opt/dnscrypt-wrapper/empty && \
      groupadd _dnscrypt-wrapper && \
      useradd -g _dnscrypt-wrapper -s /etc -d /opt/dnscrypt-wrapper/empty _dnscrypt-wrapper && \
      apt-get purge -y --auto-remove libevent-dev && \
      rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
  
  
negative.code:     apt-get autoremove -y && \
      apt-get clean && \
      rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
  
  EXPOSE 53 443
  
  VOLUME ${DNSCRYPT_WRAPPER_KEYS}
  
  USER ${DNSCRYPT_WRAPPER_USER}
  
  ENTRYPOINT ["/opt/dnscrypt-wrapper/sbin/dnscrypt-wrapper"]
  
  CMD ["--help"]
  
  