I recently moved Nextcloud and Gitea from Containers on a Debian VM to Alpine LXCs running Alpine's packages. I've never had Nextcloud's web interface so snappy and my resource usage for both is next to 0.
If you're running Proxmox I'd highly recommend trying out Alpine LXCs if they package your services.
Thanks, that's awesome news to see! I'm currently in the process of tearing out pieces from a monolithic docker stack into more lightweight (and independent) CTs, and have been apprehensive about moving NextCloud.