anchor.diff: -FROM rocker/rstudio-daily:verse
  +FROM rocker/hadleyverse 
   MAINTAINER "Tengfei Yin" yintengfei@gmail.com
   
   ## install docker (docker in docker)
  -sudo apt-get install 
   RUN apt-get update && apt-get install -y  \
       sudo \
       gdebi-core \
  
positive.code: EXPOSE 3838 8787
  
  ## COPY src/shiny-server.sh /usr/bin/shiny-server.sh
  COPY src/shiny-server.conf  /etc/shiny-server/shiny-server.conf
  COPY src/supervisord.conf /etc/supervisor/conf.d/supervisord.conf
  
  
negative.code: ## thanks to official shiny docker file
  
  # Download and install libssl 0.9.8
  RUN wget --no-verbose http://security.debian.org/debian-security/pool/updates/main/o/openssl/libssl1.0.0_1.0.1t-1+deb8u5_amd64.deb && \
     dpkg -i libssl1.0.0_1.0.1t-1+deb8u5_amd64.deb && \
     rm -f libssl1.0.0_1.0.1t-1+deb8u5_amd64.deb
  
  # Download and install shiny server
  RUN wget --no-verbose https://s3.amazonaws.com/rstudio-shiny-server-os-build/ubuntu-12.04/x86_64/VERSION -O "version.txt" && \
  