Yes of course.
The right way to do this is this: GitHub - nextcloud/all-in-one: 📦 The official Nextcloud installation method. Provides easy deployment and maintenance with most features included in this one Nextcloud instance.. So for example sudo docker exec -it --env START_CONTAINERS=1 nextcloud-aio-mastercontainer /daily-backup.sh
Feel free to submit a PR to this readme file that add this documentation for untaid. I’ll then give some feedback.