Add Docker restart handler

handlers/main.yml

 ---
-# placeholder
+- name: Restart Docker
+  ansible.builtin.service:
+    name: docker
+    state: restarted

tasks/main.yml

@@ -36,4 +36,4 @@
     src: "daemon.json"
     dest: "/etc/docker/daemon.json"
     mode: "0644"
-  notify: restart docker
+  notify: Restart Docker