Swag Docker config example for jellyfin?

[revivor]

I've read this in the commentary of the Script.

# in jellyfin settings, under "Advanced/Networking" add subdomain.mydomain.tld as a known proxy

what does this mean in my case? only domain name " domain.****.eu " or Container Name of SWAG?

this is my docker script

docker run -d \
  --name=swag \
  --cap-add=NET_ADMIN \
  -e PUID=1000 \
  -e PGID=1000 \
  -e TZ=Europe/London \
  -e URL=domain.****.eu \
  -e VALIDATION=http \
  -e PROPAGATION= #optional \
  -e DHLEVEL=2048 \
  -e ONLY_SUBDOMAINS=false \
  -e STAGING=false\
  -p 443:443 \
  -p 80:80 \
  -v /storage/.config/swag/config:/config \
  --restart unless-stopped \
  lscr.io/linuxserver/swag:latest