Add option to turn off Error Sanitization in Production

[manzaloros]

Currently, when the server mode is not development, Remix / React Router 7 removes the details of any errors being thrown before they are sent to the client: https://github.com/remix-run/remix/blob/main/packages/remix-server-runtime/errors.ts#L58
This behavior is documented here.

While it makes total sense to do this for most applications, I am working on an internal app accessible only on a corporate network, and while we're not worried about leaking internal details in the stack trace, displaying the full error details and stack trace if something goes really wrong makes it easier for us to diagnose issues the user is having.

I propose:

To add a config option to disable the error sanitization altogether (while keeping the current default of only sanitizing in prod). Perhaps an "always sanitize" option would also make sense, for those who want the dev behavior to match prod.

Other threads discussing this problem:

• Allow list for sanitised errors #12623
• How to override the error serializer/sanitizer? remix#8454
• Add option to turn off error sanitization in production remix#6061

[dralletje]

I was bumping into this too, for me I want to show the full errors on our development environment.
Having a way to handle these error in our entry.server.ts would be great, sadly handleError can't change the response currently.