docs: improve nginx example with HTTPS configuration

[toroleapinc]

Summary

Update the NGINX example configuration in the deployment guide to include HTTPS support with HTTP-to-HTTPS redirect.

Closes #1731

Changes

• Added HTTP → HTTPS redirect server block
• Added SSL/TLS configuration with Let's Encrypt certificate paths
• Referenced Mozilla SSL Configuration Generator for production tuning
• Added note about simplifying to HTTP-only for development
• Changed code block language from ini to nginx for proper syntax highlighting
• Fixed missing semicolons in uwsgi_pass directive

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (42321c9) to head (b66168b).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #2606   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
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  Files           64        64           
  Lines         7911      7911           
  Branches      1086      1086           
=========================================
  Hits          7911      7911           

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[vytas7]

I checked the rendered docs and this looks good, thanks 👍

However, a general question (since you removed the PR template): which proportion of this PR was generated by LLM ("AI")?
We'd like contributors to state this when opening a PR (if that was the case): Use of LLMs (“AI”).

[toroleapinc]

Thanks for the approval! To be transparent — the initial draft of this PR was LLM-assisted (mostly for identifying which RFCs had been superseded and generating the nginx config snippets). I reviewed and tested everything manually, and the RST fix for the Let's Encrypt reference was done by hand after seeing the CI failure.