- a yaml parser error can only be fixed by the user uploading a file, therefore it should be a 4xx, not a 5xx error
- an amp parser error indicates the amperize module is unable to handle a genuine case, and needs to be fixed at the code level
refs #10790
refs #9528
- The settings service was designed to handle more settings then just routing, but till this day there wasn't anything else added. As routes.yaml is only being used by frontend router so conceptually it fits better to have this code in frontend, so that it doesn't have to reach out to server
- The code left in server settings is the one that interacts with the database `settings` table and only partially provides information to frontend. That part is known as 'settings cache' and will be accessed through API controllers.
