[docker] add daemon config (dns)

roles/docker/files/daemon.json

@@ -0,0 +1,6 @@
+{
+  "dns": [
+    "46.182.19.48",
+    "74.82.42.42"
+  ]
+}

roles/docker/handlers/main.yml

@@ -1,3 +1,8 @@
 ---
 - name: update-grub
   shell: update-grub
+
+- name: restart-docker
+  systemd:
+    name: docker
+    state: restarted

roles/docker/tasks/config.yml

@@ -0,0 +1,6 @@
+---
+- name: add docker configuration
+  copy:
+    dest: /etc/docker/daemon.json
+    src: daemon.json
+  notify: restart-docker

roles/docker/tasks/main.yml

@@ -6,3 +6,7 @@
 - import_tasks: kernel.yml
   tags:
     - docker:kernel
+
+- import_tasks: config.yml
+  tags:
+    - docker:config