I'm running a Node+Express app via a Docker container on Railway – we're migrating over from Render.

To my surprise, various endpoints are 500ing because req.headers.authorization is undefined. In fact, req.headersitself is undefined.

This is extremely unexpected/unusual behaviour, and I assume it is related to some proxy layer that Railway has in place.

I've searched around as much as I can, but found nothing helpful. I'd like to be pointed in the right direction.

Not a great DX when getting started on a platform.