[📑 Docs]: Normalize structure: Host a static website with S3 + Terraform

[blkgrlcto]

What docs changes are you proposing?

Source: https://docs.localstack.cloud/aws/tutorials/s3-static-website-terraform/

What’s missing

• Intro (needs distinct section)
• Prerequisites (present)
• Architecture diagram (missing)
• Steps (present)
• Testing the application (missing explicit test/verify section)
• Conclusion (present)

Proposed edits

• Add ## Introduction summarizing goal (serve static site locally with S3 + Terraform).
• Add ## Architecture with a diagram (Browser → LocalStack S3 Website Endpoint).
• Add ## Testing the application with curl/browser verification and 404 page check.

Acceptance criteria

• Page follows target format with a diagram image and explicit Test section.

Code of Conduct

• I agree to follow this project's Code of Conduct

[HarK-github]

@blkgrlcto I would like to give this a try. Could you assign this to me?