Add Azure Blob Storage hosting guide and update local hosting docs

[kafeelhasan]

Proposed changes

This PR adds comprehensive documentation for hosting static content in Azure Blob Storage using private endpoints through NGINXaaS for Azure.

Changes Made

• Added new guide: "Hosting static content in Azure Blob Storage using private endpoints"
• Updated existing guide to "Hosting static content locally"
• Added cross-references between the two hosting methods
• Documented secure blob storage configuration with private endpoints and SAS token authentication
• Provided complete NGINX configuration examples with Azure internal DNS resolution
• Implemented maximum security approach with complete network isolation

Benefits

• Addresses payload size limitations (3MB) of local hosting
• Enables hosting of larger static websites with enterprise-level security
• Provides complete network isolation with private endpoints
• Uses SAS tokens for controlled, time-limited access
• Eliminates public Internet exposure of storage accounts
• Provides alternative hosting method for users requiring maximum security

Changes Preview

Screenshot 2025-10-29 at 6.59.28 PM.pdf

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. ↩

[JTorreG]

approved with suggestions

[kafeelhasan]

@russokj Made these changes based on the private endpoint solution