anchor.diff:    apt-get install -y nginx && \
     chown -R www-data:www-data /var/lib/nginx
   
  -# Install PHP and extensions
  +# Install PHP, some extensions and Composer
   RUN \
     add-apt-repository -y ppa:ondrej/php5-5.6 && \
     apt-get update && \
  -  apt-get install -y --force-yes php5 php5-fpm php5-mysql php5-curl php5-xdebug
  -
  -# Install Composer
  -RUN \
  +  apt-get install -y --force-yes php5 php5-fpm php5-mysql php5-curl php5-xdebug && \
     curl -sS https://getcomposer.org/installer | php && \
     mv composer.phar /usr/local/bin/composer
   
  -# Install Ruby
  -RUN \
  -  apt-get install -y ruby ruby-bundler && \
  -  gem install -n /usr/bin/ \
  -    sass \
  -    less \
  -    capistrano
  -
  -# Install Python
  -RUN \
  -  apt-get update && \
  -  apt-get install -y python python-pip python-virtualenv
  -
  -# Install NodeJS/NPM and globally install some dependencies (Nodemon, PM2, Bower, Gulp, etc.)
  +# Install NodeJS/NPM and globally install some packages (Nodemon, PM2, Bower, Gulp, etc.)
   RUN \
     curl -sL https://deb.nodesource.com/setup_4.x | bash - && \
     apt-get install -y nodejs && \
  
positive.code:     grunt-cli \
      mocha
  
  
  
  # Clean apt-get (it's worth nothing)
  RUN \
    apt-get clean && \
    rm -rf /var/lib/apt/lists/*
  
  
  
  
negative.code: 
  # Install Ubuntu miscellaneous packages
  RUN \
    apt-get install -y --force-yes \
      libreadline-dev \
      libssl-dev \
      libxml2-dev \
      libxslt1-dev \
      libyaml-dev \
      zlib1g-dev \
      libncurses5-dev \
      libffi-dev \
      libgdbm-dev \
      build-essential \
      software-properties-common \
      python-software-properties \
      nano \
      vim \
      curl \
      libcurl4-openssl-dev \
      git \
      wget \
      tar
  
  # Install Nginx
  RUN \
  