anchor.diff:  COPY public/* ${RADAPI_PATH}/public/
   ADD https://raw.githubusercontent.com/node-red/catalogue.nodered.org/master/catalogue.json ${RADAPI_PATH}/public/
   
  +WORKDIR ${RADAPI_PATH}
   RUN apk --no-cache add --virtual build-dependencies \
         git \
         build-base \
  
positive.code:     chown -R radapi:radapi ${RADAPI_PATH}
  
  VOLUME ${RADAPI_PATH}/data
  EXPOSE 1880
  USER radapi
  WORKDIR ${RADAPI_PATH}
  CMD npm start
  
negative.code: FROM dimdm/node:8.6.0
  
  ENV NODE_ENV=production
  ARG NODE_ENV=production
  