Staging Environment

[danieldanielecki]

When the application will have a user base we could have staging environment to test changes on pre-production before going to production.

https://stackoverflow.com/questions/58338572/how-to-set-staging-development-and-live-environment-in-react-native and https://medium.com/simform-engineering/how-to-set-up-different-environments-in-react-native-9f7902ebf282 looks like a good starting point.