Firebase Hosting Integration only

[Nikovic]

Under "Firebase Hosting Integration" (see https://github.com/angular/angularfire2/blob/master/docs/functions/functions.md#firebase-hosting-integration) you mention the possibility of avoiding a round-trip and other CORS-config.

This only applies to sites (firebase-)hosted via us-central1 though (firebase/firebase-tools#842), which I think would be nice to mention in the .md

[jamesdaniels]

Agreed, this would be good to mention. Would you be able to take a stab at a PR? Otherwise I'll get to it at some point here.

[stephangrobler]

I can update this for you. Will submit a PR shortly.

[wiedzmin26]

@stephangrobler Please, do it. @Nikovic haven't done it yet and he will not do it.

[wiedzmin26]

@stephangrobler Thank you very much.

[stephangrobler]

@wiedzmin26 Your welcome 😄