Move error handling to middleware (#143)

* Add sanitizeResMiddleware

* Delete santizieNumbers from utils

* Move all error handling to middleware

Remove unused import

Remove unused log

* Add doc comments

* Update error middleware doc comments

* Revert sanitize middleware

* Move stray eslint-disable

* Remove unused middleware types

* use request handler type

* Use proper type guards

* save

* Address Dan's comments'

* Small updates

* small change