TLDR can the *arr stack be setup to move the completed files to another server?

Before I potentially waste many hours trying to get this setup, need a bit of advice.

Been old school for a couple of decades. Running a Linux box on bare metal with a torrent client. Client gets downloads from a RSS feed and when completed, I manually copy them to my Linux server (Big JBOD), and use filebot to rename and move them to the various directories.

Been interested in switching to something more automated for a while and want to give sonarr etc. a go.

I already have a proxmox box running a few VMs so was thinking of setting up docker on there with the various sonarr, radarr, etc. and then have the completed files moved over to my linux server. The server was built around 2010 and great for streaming but I think running docker and everything else would kill it.

It is possible to set it up so that when the download is finished on the docker box, it's copied across to the server?

All the guides I've read suggest having the docker stack on the same box as the server but I'm reluctant because if it's age.