Added role for jwilder nginx proxy.

This is useful when you want to handle ssl or when you want to proxy
multiple containers on a single host.

roles/docker/main.yml

@@ -0,0 +1,25 @@
+---
+# Install Docker. Centos needs te be added.
+
+- apt_key:
+    id: 58118E89F3A912897C070ADBF76221572C52609D
+    keyserver: hkp://p80.pool.sks-keyservers.net:80
+    state: present
+  when: ansible_distribution == 'Ubuntu' and ansible_distribution_release == 'xenial'
+
+- apt_repository:
+    repo: deb https://apt.dockerproject.org/repo ubuntu-xenial main
+    update_cache: yes
+  when: ansible_distribution == 'Ubuntu' and ansible_distribution_release == 'xenial'
+
+- name: install docker
+  apt: pkg={{ item }} state=latest
+  with_items:
+     - docker-engine
+     - python-docker
+  when: ansible_distribution == 'Ubuntu' and ansible_distribution_release == 'xenial'
+
+- name: make sure service is started
+  systemd:
+    name: docker.service
+    state: started