Expose NGINX Plus dashboard

[sjberman]

Problem: As a user, I want observability into the NGINX Plus configuration and metrics.

Solution: By exposing the NGINX Plus dashboard, a user can easily visualize real-time metrics and information about the configuration.

Closes #1381

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[ADubhlaoich]

LGTM: I have approved but please review the feedback I have for the image's alt text.

Screenshots come with a maintenance cost: if the UI they are capturing is updated, all screenshots of it also need to be updated.

I would avoid using screenshots in the future, or document a procedure for routinely checking and updating the accuracy of screenshots in the documentation.

[pleshakov]

the updates look good.

does it make sense to include this port to this https://github.com/nginxinc/nginx-gateway-fabric/blob/main/site/static/img/ngf-pod.png and into architecture doc?

It it described in NIC -- https://docs.nginx.com/nginx-ingress-controller/overview/design/#the-nginx-ingress-controller-pod

[sjberman]

@pleshakov Since it's only an N+ port, I hesitate to add to the image and main table. I could add a separate note to the architecture doc though that briefly describes.

[pleshakov]

👍