[fix] Install ruby and SASS with Docker

Author: codydaig

Dockerfile

@@ -2,6 +2,11 @@ FROM node:0.10
 
 MAINTAINER Matthias Luebken, [email protected]
 
+# Install gem sass for  grunt-contrib-sass
+RUN apt-get update -qq && apt-get install -y build-essential
+RUN apt-get install -y ruby
+RUN gem install sass
+
 WORKDIR /home/mean
 
 # Install Mean.JS Prerequisites