I see a description of the FME_SERVER_WEB_URL in documentation.

Question: What does it do?

With a setup that has a proxy server that relays requests to the FME Flow server via URL ReWrite and ARR, a flawed web-hook request (e.g., a parameter name address is given to a web hook that doesn’t have an address parameter) causes an error message to be returned to client--with details such as the internal server name (as set by FME_SERVER_WEB_URL, which is set to the internal server out-of-the-box) and the FME Flow username of user who published workspace.

I understand changing service URLs for this sort of setup; that seems to be how the client knows how to download/stream the result. But FME_SERVER_WEB_URL seems to be more for just info provision (logging, etc.). What if I don’t want the FME_SERVER_WEB_URL parameter to show the internal server name in error messages from bad web-hook requests?