SOLVED Serve custom 404
I understand that surfer is meant to be a simple static file server - that is why we have chosen it for hosting a few sites. It can be integrated into CICD pipelines easily - thanks for that. The only missing feature is serving a custom 404 site. Maybe this could be added if its useful for others as well.
@stantropics you can place a 404.html into the folder and it will serve that instead of the built-in one, if that is what you are looking for.
@nebulon Awesome - that's exactly what I am looking for! Thanks!