It depends a bit on the filesystem that you are choosing for proxmox however. Afaik there are still problems with zfs as the host filesystem and docker in an lxc. the general recommendation is to use an extra virtual disk that is ext4 formatted for /var/lib/docker
.
What are other products in this kind of space? Something where you could get some stats from the host and docker and have the ability to control containers through a web interface (like pulling new containers, restarting, changing env variables)?