Hi Carl,
actually linked thread describes only running Roon in the VM on the Qnap.
I have tried to do manual install on my Qnap, however ended up with issue Roon not able to resolve anything from DNS (or /etc/hosts) - apparently some library incompatibility?
Please find the debug log here: Installation of RoonServer on a QNAP NAS?
I would love to have this resolved as running Roon Server (core) on my Qnap is my much much preffered setup 
Many thanks!