All errors are treated as a 404

[kyle-mccarthy]

Originally discussed in nestjs/nest#1122 (comment)

[kyle-mccarthy]

@rahulparekh I have updated the example to properly handle errors that are not 404s. You can view the changes in 121bf79 to update your starter.

Basically, if the err.response isn't set on the error, it likely didn't originate from some user action and should be considered an internal server error. Knowing this we can call Nextjs error handler.

However, the original render service didn't have access to that so I have updated the service, added the new error renderer to the filter constructor and passed it in when it is instatiated in the main file..