Use the right container_runtime when pruning deleted services

roles/docker/tasks/main.yml

@@ -17,7 +17,7 @@
   when: "container_runtime == 'podman'"
 
 - name: Login to the Docker registry
-  command: 'echo -n "{{ docker_registry_password }}" | docker login -u "{{ docker_registry_username }}" --password-stdin "{{ docker_registry_url }}"'
+  command: 'echo -n "{{ docker_registry_password }}" | {{ container_runtime }} login -u "{{ docker_registry_username }}" --password-stdin "{{ docker_registry_url }}"'
   changed_when: False
   when: "docker_registry_url != ''"
 
@@ -38,7 +38,7 @@
 # the ones that are not specified in services.yml.
 
 - name: Get list of running containers
-  command: "docker ps --format={% raw %}'{{.Names}}'{% endraw %}"
+  command: "{{ container_runtime }} ps --format={% raw %}'{{.Names}}'{% endraw %}"
   changed_when: False
   check_mode: no
   register: docker_running_containers