Error handling

Not covered: It stops at the response the client receives. On Node.js in production a 5xx error goes out as its generic message only, and capire's advice for an unexpected error is to make sure it is logged and not to keep the app running; keeping a record of failures beyond a loggingLoggingcapabilitySeeing what a running service did, in a form something can read afterwards — levels, a formatter that suits a laptop and one that suits a log service.SAP only line and telling a person about them, which is notificationsNotificationscapabilityTelling a person something happened when they are not looking at the screen — a notification in the launchpad, an email, a message somewhere they already are.SAP and community, narrow by design, are left to a plugin or the application's own code.