Is production going to be the name of a variable or a value? Given that you can't be running in more than one place at once, I don't see why you'd have an env var like PROD=true instead of something like STAGE=prod, since otherwise you need to decide what to do if you have both PROD=true and DEV=true. Environmental variable values certainly don't have to be all caps, so I don't think you're explanation makes sense.
