set firebase to prod mode before deployment

[bxie]

To silence the firebase warnings in console. And probably for security?

Warning:

It looks like you're using the development build of the Firebase JS SDK.
When deploying Firebase apps to production, it is advisable to only import
the individual SDK components you intend to use.

For the module builds, these are available in the following manner
(replace with the name of a component - i.e. auth, database, etc):

CommonJS Modules:
const firebase = require('firebase/app');
require('firebase/');

ES Modules:
import firebase from 'firebase/app';
import 'firebase/';

Typescript:
import * as firebase from 'firebase/app';
import 'firebase/';

[bxie]

this may be done automatically? don't see warnings on deployed version

[bxie]

Firebase launch checklist doesn't mention this, so not necessary.