is there a way to differentiate ember serve from ember build in environment.js?

I would like to either be able to pass an argument in ember build that differentiates it from ember serve (http://localhost:4200).

I am trying to have a different rootURL when running locally through localhost:4200 and when it is build in the dev server using ember build https://www.example.com/app .

Otherwise is it possible to set the default environment of ember serve to be 'local' instead of 'development?

Thanks