docs: added guide for working with NGINX Configs

[nginx-nickc]

Proposed changes

feat: new guide for working with NGINX Config in the F5 NGINX One Console

• include how to GET NGINX Config for instances / config-sync-groups
• how to update NGINX Config for instances / config-sync-groups using PUT, and PATCH

Closes: #1063

Checklist

Before sharing this pull request, I completed the following checklist:

• I read the Contributing guidelines
• My branch adheres to the Git conventions
• [ X My content changes adhere to the F5 NGINX Documentation style guide
• If my changes involve potentially sensitive information¹, I have assessed the possible impact
• I have waited to ensure my changes pass tests, and addressed any discovered issues

Footnotes

1. Potentially sensitive information includes personally identify information (PII), authentication credentials, and live URLs. Refer to the style guide for guidance about placeholder content. ↩

[mjang]

General comment: @nginx-nickc , I like what you've set up. I understood what you were describing on my first read!

Some of my suggestions will be stylistic. I'm going to suggest organizing your "step 2" differently, so users can see subsections in the Table of Contents (left column) like:

• Update all contents with PUT
• Update a single file with PATCH
• Set up multiple updates with PATCH

Maybe a separate reference section: (h/t Tim's suggestion)

• How to base64 encode a JSON file

You can build docs locally, based on https://github.com/nginx/documentation/blob/main/documentation/writing-hugo.md. Alternatively, if you use a clone, our GH process will build the docs for you. I've checked memberships, and I think you should be able to use a clone of this repo.

[mjang]

@nginx-nickc I like what you've done!

In most cases, my suggestions are stylistic. I have not tested any of the REST calls you've laid out. You can find:

• Our style guide: https://github.com/nginx/documentation/blob/main/documentation/style-guide.md
• Instructions for building locally: https://github.com/nginx/documentation/blob/main/documentation/writing-hugo.md

Tip: for NGINX/F5 employees, we've set up PRs from repo clones to build in the frontdoor-test-docs.nginx.com domain.

Let me know what you think of my comments. If you're OK with them, I'll be happy to approve and merge :)

[mjang]

Thanks!