[felix,sett] build with explicit buildtool requirements

Dockerfile

@@ -1,8 +1,10 @@
 FROM alpine:3.5
 MAINTAINER the-mast@thoughtworks.com
 
-RUN apk add --no-cache build-base python nodejs git curl php5 php5-curl php5-openssl php5-json php5-phar php5-dom
-RUN npm install -g gulp-cli bower
+RUN apk add --update --no-cache gcc g++ make git curl 
+RUN apk add --update --no-cache python nodejs 
+RUN apk add --update --no-cache php5 php5-curl php5-openssl php5-json php5-phar php5-dom
+RUN npm install -g gulp-cli bower node-sass
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/bin --filename=composer
 
 CMD ["/bin/sh"]