Can I have a serviceless Ingress

I wanted to implement a 302 redirect the other day. Normally you run a nginx (or other web server) where you setup the server configuration and give a directive like

server {
  listen 0.0.0.0;
  server_name _;
  root /app;
  index index.htm index.html;
  return 301 $scheme://new_web_server_here$request_uri;
}

So I set about doing that, but thought that it would mean I am running an extra pod, without much need to do so. Would it be possible to run it via the Ingress controller directly? Yes it is possible to do so, since if you do not specify a backend in the nginx ingress controller, it falls back to the default backend and you can affect the ingress behavior with entering a code snippet:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: not-nginx
  annotations:
    nginx.ingress.kubernetes.io/server-snippet: |
      return 302 https://new_web_server_here$request_uri;
spec:
  tls:
  - hosts:
    - old_name_here
    secretName: secret_name_here
  rules:
  - host: old_name_here

(Do not copy-paste, check indentation as sometimes WordPress mangles it)

Depending your setup, you may need to run a separate nginx instance, as snippets can create a security issue in a cluster where many users can configure Ingress objects.