Expose generated results via lightweight NGINX web server

[matiasAS]

Summary

This PR adds an optional, lightweight NGINX web server to expose the generated results/ directory over HTTP after the rule extraction process finishes.

The existing behavior is preserved:

• The Python script runs once
• Firewall rules are fetched using environment variables
• CSV, PDFs and graphs are generated as before

Once the Python process completes, NGINX starts and serves the generated files.

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How it works

• The container runs the Python script first
• Results are written to results/
• NGINX is started on port 8080
• Directory listing is enabled for easy browsing of generated files

No changes were made to the core Python logic or data flow.

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Usage

docker build --no-cache -t pyfrc2g .

docker run --rm \
  -e PFS_BASE_URL=<PFS_BASE_URL> \
  -e PFS_TOKEN=<PFS_TOKEN> \
  -p 8080:8080 \
  pyfrc2g