anchor.diff:  # Jekyll runs on port 4000 by default
   EXPOSE 4000
   
  -# Run Jekyll when the container starts
  -RUN mkdir -p /etc/my_init.d
  -COPY jekyll-serve.sh /etc/my_init.d/jekyll-serve.sh
  -
  -# Clean up APT when done.
  -RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*+# Run jekyll serve
  +CMD ["./jekyll-serve.sh"]
positive.code: ADD Gemfile.lock Gemfile.lock
  RUN bundle install 
  
  # Copy source and install Gems
  RUN mkdir -p /src
  VOLUME ["/src"]
  WORKDIR /src
  
negative.code: FROM gliderlabs/alpine:3.2
  MAINTAINER Yevgeniy Brikman <jim@ybrikman.com>
  
  # Install all the dependencies for Jekyll
  RUN apk-install bash build-base libffi-dev zlib-dev libxml2-dev libxslt-dev ruby ruby-dev nodejs
  
  # Install Jekyll
  RUN gem install bundler jekyll --no-ri --no-rdoc
  
  # Install nokogiri separately because it's special
  RUN gem install nokogiri -- --use-system-libraries
  
  # Copy the Gemfile and Gemfile.lock into the image and run bundle install in a
  # way that will be cached
  