docker: use debian packages instead of upstream

roles/docker/tasks/main.yml

@@ -1,17 +1,10 @@
 ---
 
-- name: Enable docker apt-key
-  apt_key: url='https://download.docker.com/linux/debian/gpg'
-
-- name: Enable docker repository
-  apt_repository:
-    repo: 'deb https://download.docker.com/linux/debian {{ ansible_distribution_release }} stable'
-    filename: docker
-
 - name: Install docker
   apt:
     name:
-    - docker-ce
+    - docker.io
-    - docker-ce-cli
-    - containerd.io
     - python3-docker
+
+- name: Enable docker
+  service: name=docker state=started enabled=yes