John Carew 551d60f193 Update TLS termination documentation for NGINX v0.22 ...

Clarify the configuration for external TLS termination with NGINX
v0.22, including:

- Instructions to enable the `use-forwarded-headers` option for
  ingress in both RKE and RKE2 installations.
- A new section for RKE2 detailing how to create a custom
  configuration file for this setting.
- Updates to the required headers section to include
  `X-Forwarded-Proto` and `X-Forwarded-Port`.

2025-06-05 13:37:59 -05:00

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Update TLS termination documentation for NGINX v0.22

2025-06-05 13:37:59 -05:00