Question: Best way to use different configs per command line arguement

I kind of feel like this has to be dumb question, but I'm looking for a decent way to use different configurations based on a command line flag. I have a CLI tool that I interact with different versions of a database (development, staging, production) and want to change the behavior based on an argument passed rather than an environment variable. I'm currently using dependency injection with System.CommandLine.Hosting. Any suggestions?