A minimal Kubernetes default backend server for unmatched ingress requests.
Kubernetes Ingress Default Backend is a small HTTP server historically used by Kubernetes ingress deployments to handle
unmatched requests. It returns default backend - 404 with HTTP 404 for application traffic, and exposes a health
endpoint for probes.
This image is source-built from the Kubernetes ingress-gce 404-server source, where the default backend component is currently maintained.
For more details, visit https://github.com/kubernetes/ingress-gce/tree/v1.40.5/cmd/404-server.