Make configuration environment

Is there a good way to handle different configuration based on environment then insert it with condition, something like, dev config when using ionic serve and another config for ionic run with two (or more) files like this:

dev.config.json

{
"API_URL": "http://uri.to.dev"
}

prod.config.json

{
"API_URL": "http://uri.to.prod"
}

did you solve it? any clue?

Not at all, still stuck on that.Make configuration environment