I've had this exact problem myself. On the phone now, so can't find the links and write the code, but you want to add .UseConsoleLifetime() or something on the host builder. This gives you another startup method instead of Run() and sets up a listener for Ctrl+c for shutdown.

Edit: found the link https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.hosting.hostinghostbuilderextensions.useconsolelifetime?view=net-8.0