Callback Domain (localhost vs staging)

I have been working on a strava app and I have been the only tester.  I’m at a point that I need additional testers so I just submitted a request for this.

As far as switching between local and staging environments, I’ve had to switch Strava Callback Domain manually between localhost and staging. Once I get approval for additional testers I won’t be able to do this manually.  Appreciate any insights for how I can make this work for both and not have to manually switch Strava’s callback domain.

Thank you in advance!