anchor.diff:  
   WORKDIR /usr/src/xo/server
   
  -ENV XO_REF v4.7.0
  +ENV XO_SERVER_REF v4.16.1
  +ENV XO_WEB_REF v4.16.0
   
  -RUN git clone -b "$XO_REF" --single-branch git://github.com/vatesfr/xo-server.git .
  -RUN git clone -b "$XO_REF" --single-branch git://github.com/vatesfr/xo-web.git ../web
  +RUN git clone -b "$XO_SERVER_REF" --depth 1 https://github.com/vatesfr/xo-server.git .
  +RUN git clone -b "$XO_WEB_REF" --depth 1 https://github.com/vatesfr/xo-web.git ../web
   
   RUN set -x \
   	&& npm install \
  
positive.code: 
  RUN sed " \
  		s!#'/': '/path/to/xo-web/dist/'!'/': '../web/dist/'!; \
  		s!#uri: ''!uri: 'tcp://redis:6379'!; \
  	" sample.config.yaml >.xo-server.yaml
  
  EXPOSE 80
  CMD ["npm", "start"]
  
negative.code: FROM node:4
  
  # see https://github.com/vatesfr/xo/blob/a269af702992616f67b7bcf066eac0a1124ac8bf/doc/installation/manual_installation.md
  
  