Add option change the port that the dev server runs on

[zenorocha]

Desired behavior:

"scripts": {
    "dev": "email dev -p 3001",
}

[zenorocha]

it's live now @sneakyvv, @GRA0007, @caseypugh, get v1.7.9 to use it

[gokulkrishh]

@zenorocha I was searching for this ended up finding in closed issues, is it possible to enable discussions in this repo? It would be lot easier to ask/create discussions related to react-email. Like supabase is doing.