Add Directory storage requirements. Also, dependency requirements for NIM, NGINX and Clickhouse in offline mode

[vvnginx]

Proposed changes

Add Directory storage requirements. Also, dependency requirements for NIM, NGINX and Clickhouse in offline mode

Checklist

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

• I read the Contributing guidelines
• My branch adheres to the Git conventions
• 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]

Fix for format issues. Example, unless you use bullets, the build appears like this:

[mjang]

Approving from a TW PoV based on recent changes

[mjang]

Merging with one other approval, since other writers are either gone for the weekend or on PTO