As a side-note, as soon as I added some DNS A records pointing to a testing server, it started getting spammed by bots trying to hack into the server (accessing all sorts of random paths that might be exposed, like .env or common PHP files). Not sure what the solution to this is, apart from not adding DNS records for testing servers, maybe only allow access to the server from specific IPs? But that makes testing harder, if you send a link to someone with a dynamic IP.