A simple way to persist a config to `.env` locally

[vv24ua]

I know you prefer we modify our package.json but we often enhance .env using a .env.local and appreciate being able to persist our configs.

[edgarrmondragon]

@vv24ua is this addressed by #62?

[maidul98]

Also with the new CLI, you do no need to modify your package json file. Let me know if you would like more details