NC Talk on remote server

Hi folks,

Nextcloud is running on my NAS, which is connected to my private Internet connection. Everything is great, only the latency and internet speed leaves a lot to be desired for NC Talk.
I would therefore like to move only the NC Talk to my (rented) web server (and leave the rest on my NAS).

The current constellation is:
NAS with Ubuntu 22, NC v27 in Docker (nextcloud itself, mariadb, redis, collabora and also coturn).
My VPS (internet server) has a static IPv6 & IPv4 address, via which my domains (DNS) also run.

I would like to have NC Talk integrated into my existing cloud (with all users etc.) as normal. How can I let Talk benefit from the much faster server?

Thank you very much!