feat(notification): add to field for email (#327)

src/config.ts

@@ -67,6 +67,7 @@ const notifications = {
 	},
 	email: {
 		password: envOrString(process.env.EMAIL_PASSWORD),
+		to: envOrString(process.env.EMAIL_TO, envOrString(process.env.EMAIL_USERNAME)),
 		username: envOrString(process.env.EMAIL_USERNAME)
 	},
 	phone: {

src/notification/email.ts

@@ -25,7 +25,7 @@ export function sendEmail(link: Link, store: Store) {
 		from: email.username,
 		subject: Print.inStock(link, store),
 		text: link.cartUrl ? link.cartUrl : link.url,
-		to: email.username
+		to: email.to
 	};
 
 	transporter.sendMail(mailOptions, error => {