Set up an actual SMTP server to send mail

[quasimik]

Ideally set it up on the upe.seas.ucla.edu server. Use this server to send all testbank mail. Make sure to change relevant lines:

UPE-Website-V2/backend/src/mailer.js

Lines 13 to 24 in 05f09da

	async init() {
	const testAccount = await nodemailer.createTestAccount() // from ethereal.email
	this.#transporter = nodemailer.createTransport({
	host: 'smtp.ethereal.email',
	port: 587,
	secure: false, // true for 465, false for other ports
	auth: {
	user: testAccount.user,
	pass: testAccount.pass
	}
	})
	}

As per #16 , these constants should be passed in via env vars eventually.