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Proxmox Virtual Environment 9.1 available
(www.proxmox.com)
Proxmox VE is a complete, open-source server management platform for enterprise virtualization. It tightly integrates the KVM hypervisor and Linux Containers (LXC), software-defined storage and networking functionality, on a single platform. With the integrated web-based user interface you can manage VMs and containers, high availability for clusters, or the integrated disaster recovery tools with ease.
That last is interesting. I'm going to play with that some.
With buildah you can take it even farther and build a container "from scratch." So, no packages at all. Then use your package manager to install the bare minimum to get things done.