Make into a NPM package

[horner]

That way other systems can import and use it.

[runleveldev]

Updated title to be more accurate.

Example of what this should look like:

import NotificationService from '@mieweb/notification-auth';
const notificationService = new NotificationService(process.env.NOTIFICATION_URL, [process.env.NOTIFICATION_API_KEY]);
const response = await notificationService.authenticate(username);
if (response.approved) {
  ... do stuff ...
} else if (response.timeout) {
  ... do something else ...
} else {
  ... reject ...
}

Where NOTIFICATION_URL=https://auth.example.com and the package automatically appends /send-notification and any other parameters needed.