anchor.diff:      77984A986EBC2AA786BC0F66B01FBB92821C587A \
       8FCCA13FEF1D0C2E91008E09770F7A9A5AE15600 \
     ; do \
  -    gpg --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys "$key" || \
  -    gpg --keyserver hkp://ipv4.pool.sks-keyservers.net --recv-keys "$key" || \
  -    gpg --keyserver hkp://pgp.mit.edu:80 --recv-keys "$key" ; \
  +    keyserver_ok=""; \
  +    for keyserver in ${keyservers}; do \
  +      gpg --keyserver ${keyserver} --recv-keys "$key"; >/dev/null 2>&1 && keyserver_ok="ok" && break; done; \
  +    done; \
  +    if [[ -z $keyserver_ok ]]; then echo "No valid response from keyservers"; exit 1; fi; \
     done
   
   ENV NODE_VERSION 8.12.0
  
positive.code: 
  # gpg keys listed at https://github.com/nodejs/node#release-team
  RUN set -ex \
    && for key in \
      94AE36675C464D64BAFA68DD7434390BDBE9B9C5 \
      FD3A5288F042B6850C66B31F09FE44734EB7990E \
  
negative.code: EXPOSE 3300
  CMD [ "npm", "run", "docker-start" ]
  
  # EXPECTS: a2 at 3000, kafka at 2181, openlrs at 8080
  