Allow to set data root and storage driver for docker

roles/docker/tasks/main.yml

@@ -45,16 +45,9 @@
     - python-docker
 
 - name: Set docker configuration
-  copy:
+  template:
+    src: templates/daemon.json.j2
     dest: /etc/docker/daemon.json
-    content: |
-      {
-          "exec-opts": ["native.cgroupdriver=systemd"],
-          "log-driver": "json-file",
-              "log-opts": {
-                  "max-size": "100m"
-              }
-      }
   notify: restart docker
 
 - name: Check current docker-compose version.