Hello,
I have installed Collabora Online Development Edition in unprivileged CT of Proxmox (and Nextcloud on an other CT) :
LOOLWSD 6.4.10 (git hash: b4fa48ef)
Collabora Office 6.4-45 (git hash: a21347f)
It is on a "Debian GNU/Linux 10 (buster)" unprivileged CT of Proxmox with...