anchor.diff:  RUN apt-get update && apt-mark hold initscripts && apt-get upgrade -y && apt-get clean # 20140305
   
   # essentials
  -RUN apt-get install -y vim curl wget sudo net-tools && \
  +RUN apt-get install -y vim curl wget sudo net-tools pwgen && \
   	apt-get install -y logrotate supervisor openssh-server && \
   	apt-get clean
   
  
positive.code:     rm -rf /tmp/ruby-1.9.3-p484 && gem install --no-ri --no-rdoc bundler mysql2
  
  RUN gem install --no-ri --no-rdoc passenger -v 3.0.21 && passenger-install-apache2-module --auto
  RUN apt-get install -y pwgen memcached && apt-get clean
  RUN apt-get update && apt-get upgrade -y && apt-get clean # 20140225
  
  ADD resources/ /redmine/
  
negative.code: 
  # image specific
  RUN apt-get install -y unzip apache2-mpm-prefork imagemagick mysql-server \
        memcached subversion git cvs bzr && apt-get clean
  
  RUN apt-get install -y libcurl4-openssl-dev libssl-dev \
        apache2-prefork-dev libapr1-dev libaprutil1-dev \
  