only one server name for nextcloud is allowed

defaults/main.yml

@@ -23,8 +23,7 @@ nextcloud_defaultapp: files
 
 nextcloud_database_type: mysql
 
-nextcloud_server_names:
-  - "{{ inventory_hostname }}"
+nextcloud_server_name: "{{ inventory_hostname }}"
 
 nextcloud_force_downgrade: false
 

vars/main.yml

@@ -24,3 +24,6 @@ nextcloud_php_config: "{{ nextcloud_php_config_map[nextcloud_webserver] }}"
 nextcloud_php_config_map:
   nginx: fpm
   apache2: apache2
+
+nextcloud_server_names:
+  - "{{ inventory_hostname }}"