refactor: change method for downloading Docker GPG key to use curl and convert to binary keyring

playbooks/install-standard-docker.yml

@@ -29,11 +29,11 @@
         state: directory
         mode: "0755"
 
-    - name: Download Docker GPG key to keyring path
-      get_url:
-        url: https://download.docker.com/linux/ubuntu/gpg
-        dest: "{{ docker_key_path }}"
-        mode: "0644"
+    - name: Download Docker GPG key and convert to binary keyring
+      shell: |
+        curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o {{ docker_key_path }}
+      args:
+        creates: "{{ docker_key_path }}"
 
     - name: Stat Docker GPG key file
       stat: