* Fix old tag of custom error pages used in example
* Move nginx-errors to k8s registry
Since the setup for the custom-error-messages was really different from
the other images that are build using cloudbuild, I changed it to "fit
in better"
* Use Go version 1.17 for custom-error-pages
Since Go >= 1.16 required the use of modules, I also initialized the module using the name k8s.io/ingress-nginx/custom-error-pages
The flag stated in the example readme is `--default-backend` but passing that (or looking at --help`) for the ingress controller shows:
unknown flag: --default-backend
...
--default-backend-service string Service used to serve HTTP requests not matching any known server name (catch-all).
Takes the form "namespace/name". The controller configures NGINX to forward
requests to the first port of this Service.
ref: https://github.com/kubernetes/ingress-nginx/blob/master/cmd/nginx/flags.go#L55
- Add missing label `app.kubernetes.io/part-of: ingress-nginx` for deploy example
- Update new labels for docs/deploy and docs/examples
- Update new labels for test/e2e and test/manifests
- Update new labels for images/nginx
Also close#3001
