converting this to Docker

wercker-box.yml

@@ -1,21 +0,0 @@
-name: golang-gulp-ruby
-version: 0.0.1
-inherits: wercker/ubuntu12.04-webessentials@0.0.3
-type: main
-platform: ubuntu@12.04
-description: wercker box to run hugo in combination with nodejs and ruby
-keywords:
-  - golang
-  - nodejs
-  - ruby
-  - opensource
-script: |
-  sudo apt-get update -y
-  sudo apt-get install golang build-essential -y
-  sudo curl -L https://get.rvm.io | bash -s stable
-  sudo source ~/.rvm/scripts/rvm
-  sudo rvm requirements
-  sudo rvm install ruby
-  sudo rvm use ruby --default
-  sudo curl --silent --location https://deb.nodesource.com/setup_0.12 | sudo bash -
-  sudo apt-get install --yes nodejs