Nextcloud Cron file deck app

Hello community,
I am using unraid and linuxserver nextloud. I want to reduce cron call interval, because the Deck application actions have to be refreshed more frequently to recive the notification and edit on every single minute.

I tried to find the cron.php without success. In the config path there is no cron.php file.


I find only this:

But when I tried following cmd:

docker exec -i nextcloud sudo -u abc php -f /config/www/nextcloud/apps/deck/lib/Cron/ScheduledNotifications.php

this response came:

PHP Fatal error: Uncaught Error: Class “OCP\BackgroundJob\Job” not found in /config/www/nextcloud/apps/deck/lib/Cron/ScheduledNotifications.php:34
Stack trace:
#0 {main}
thrown in /config/www/nextcloud/apps/deck/lib/Cron/ScheduledNotifications.php on line 34

Do I have a fault in my installation?
Or why I dont have cron.php file?

did you install the docker mod for cron?