System Cron using Synology Diskstation Task Scheduler

My Nextcloud web interface has informed me that some of my background processes aren’t getting done, and that I should consider a switch to system cron. Fine by me, the Synology Diskstation my Nextcloud instance resides on has a Task Scheduler that can run such commands on a schedule, My only issue is I’m running Nextcloud as a Docker image, and am not sure what to put the command in as.
Anyone run in this configuration before?