It's 19 dockers, currently using 24.9GB of the 30GB docker vdisk
I guess that's normal-ish? Seems like ~1.3 GB/docker.
I'll just up to 40GB I guess, and provide like 2GB each, for up to 20 dockers.
Immich dockers apparently get up to 4GB in size as reported by others: https://forums.unraid.net/topic/154165-is-immich-a-docker-image-hog/
Squid reports running 7 docker using up 7 GB, so 1GB/docker: https://forums.unraid.net/topic/36057-noobie-docker-setup-guide/#findComment-347466
I also found this reddit post with docker sizes for comparison:
I guess 1.3GB/docker average container size isn't unreasonably large, especially with very large ones like Immich, and things requiring a full user interface Calibre/Firefox, and Binhex dockers using archlinux.