Move to Alternative Ingress Controller

[artntek]

Refactor API server helm chart to not use ingress-nginx, and instead use alternative ingress controller.

Suggestions include Traefik - which is supposedly able to interpret ingress-nginx annotations without modification.

[mbjones]

See:

• https://traefik.io/blog/the-ultimate-ingress-nginx-migration-kit
• https://ingressnginxmigration.org
• https://doc.traefik.io/traefik/migrate/nginx-to-traefik/

[artntek]

Also see DataONEorg/k8s-cluster#78