Unfortunately this trick didn't work for me. I'm currently not in a paid developer team and really just want to explore some ideas for myself. The local web application does not support HTTPS, which isn't great but theoretically not an issue in this particular case. As soon as I add NSAppTransportSecurity into my entitlements Xcode declines to build and requires me to select a signing certificate. When I manage signing automatically Xcode builds the app but that immediately exits with a Message from debugger: Error 1 error. I'm currently running a really old version of Xcode (11.3) on Mojave for certain reasons.

And once again, in true Apple fashion the issue gets recognised and simply ignored. I really don't understand why this company strives to make macOS less and less useful, removes more and more unique features and APIs that made the system so great in the past. Sad.