add npipe support to docker_swarm_service (#60073)

* add npipe support to docker_swarm_service

* add changelog fragment

* tweak changelog fragment formatting

* Update lib/ansible/modules/cloud/docker/docker_swarm_service.py

Co-Authored-By: Felix Fontein <felix@fontein.de>

changelogs/fragments/60073-docker_swarm_service_add_npipe.yml

@@ -0,0 +1,2 @@
+minor_changes:
+- docker_swarm_service - Add ``npipe`` mount support.

lib/ansible/modules/cloud/docker/docker_swarm_service.py

@@ -285,12 +285,14 @@ options:
       type:
         description:
           - The mount type.
+          - Note that C(npipe) is only supported by Docker for Windows. Also note that C(npipe) was added in Ansible 2.9.
         type: str
         default: bind
         choices:
           - bind
           - volume
           - tmpfs
+          - npipe
       readonly:
         description:
           - Whether the mount should be read-only.
@@ -2535,7 +2537,7 @@ def main():
             type=dict(
                 type='str',
                 default='bind',
-                choices=['bind', 'volume', 'tmpfs'],
+                choices=['bind', 'volume', 'tmpfs', 'npipe'],
             ),
             readonly=dict(type='bool'),
             labels=dict(type='dict'),