Added a dockerregistry docker.

We should roll out our dockers from here.

Changed password

(I failed to save it somewhere)

Reencrypted htpasswd using docker's htpasswd

see: 33a74ba9af/registry/part-3.md

roles/dockerregistry/tasks/main.yml

@@ -0,0 +1,25 @@
+# Install a docker based mariadb.
+---
+- include: ../common/tasks/docker.yml
+- name: install service file.
+  template:
+    src: files/dockerregistry.service
+    dest: /etc/systemd/system/dockerregistry.service
+    mode: 644
+    owner: root
+    group: root
+- name: install service file
+  command: systemctl daemon-reload
+- name: make sure service is started
+  systemd:
+    name: dockerregistry.service
+    state: started
+
+- name: Copy certificates and passwd file
+  copy:
+    src: "{{ item }}"
+    dest: /srv/dockerregistry
+  with_items:
+     - auth
+     - certs
+