For what reason are you trying to avoid docker? since most projects provide docker images and an example docker-compose.yml it’s very easy to get the application you want running.

Otger projects that do plug and play application setup like yunohost etc. are casaOS and umbrel (both use docker under the hood btw)

If you use let’s encrypt certificates on that subdomain it’s pretty easy to find. https://crt.sh/

if you snatch a popular torrent that is fine but with dying torrents that is quite harmful