Support git

Author: cybertk

Dockerfile

@@ -42,3 +42,6 @@ RUN curl -fSL "https://${DOCKER_BUCKET}/builds/Linux/x86_64/docker-$DOCKER_VERSI
 
 # Install ruby and sass
 RUN apt-get install -y ruby && gem install sass
+
+# Install git
+RUN apt-get install -y git

README.md

@@ -10,6 +10,7 @@
 - node.js 4.1.0 with npm
 - Ruby 1.9.1 with gem 1.8.23
 - [Saas][] 3.4.18
+- git 1.9.1
 
 [docker:dind]: https://hub.docker.com/_/docker/#
 [Saas]: https://github.com/sass/sass