server/nextcloud: Add support for configuring default phone region

roles/server/nextcloud/defaults/main.yml

@@ -33,6 +33,7 @@ database_user: "{{ system_user }}"
 nextcloud_admin_user: "admin"
 nextcloud_admin_pass: "{{ lookup('password', 'credentials/' + inventory_hostname + '/' + domain + '/' + nextcloud_admin_user + ' length=80') }}"
 
+default_phone_region: "DE"
 reset_password_link: "disabled" # "" means internal enabled, "disabled" means disabled, <link> means using this link
 
 import_config:
@@ -57,6 +58,8 @@ import_config:
     redis:
       host: "{{ redis_socket_path }}"
       port: 0
+    # user experience
+    default_phone_region: "{{ default_phone_region }}"
 
 enabled_apps_list:
   - accessibility