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.
Alpine packages services like Gitea and Nextcloud which Debian does not. This makes keeping up to date alot simpler for myself but that’s personal preference.