server/nextcloud: Allow access for nginx for seeing php files

roles/server/nextcloud/meta/main.yml

@@ -6,6 +6,7 @@ dependencies:
   - role: misc/system_user
     # system_user
     user_directory: "{{ nextcloud_user_directory }}"
+    user_directory_group: "{{ nginx_system_user }}"
   - role: mysql/database
     # database_user
   - role: nginx/php-pool