anchor.diff:  #
  -# Rails application dockerfile
  +# Rails application docker image
   #
   # http://github.com/tenstartups/railsapp-docker
   #
   
  -# Pull base image.
  -FROM debian:jessie
  +FROM ruby:latest
   
   MAINTAINER Marc Lennox <marc.lennox@gmail.com>
   
  
positive.code: ENV PSQL_HISTORY /home/rails/.psql_history
  
  # Install base packages.
  RUN apt-get update
  RUN apt-get -y install \
    build-essential \
    curl \
    ghostscript \
    git \
    imagemagick \
    graphviz \
    libcurl4-openssl-dev \
    libreadline6-dev \
    libssl-dev \
    libsqlite3-dev \
    libxml2-dev \
    libxslt1-dev \
    libyaml-dev \
    mysql-client \
    nano \
    python \
    python-dev \
    python-pip \
    python-software-properties \
    python-virtualenv \
    sqlite3 \
    wget \
    zlib1g-dev
  
  # Add postgresql client from official source.
  RUN \
  
negative.code: RUN \
    curl -sL https://deb.nodesource.com/setup | bash - && \
    apt-get install -y nodejs
  
  # Install ruby gems.
  RUN gem install awesome_print bundler rubygems-update --no-ri --no-rdoc
  