Add nginx reverse proxy service for Supervisor web UI at supervisor.ai.pivoine.art with Authelia authentication. Proxies to RunPod GPU instance via Tailscale (100.121.199.88:9001).
Changes:
- Create supervisor-nginx.conf for nginx proxy configuration
- Add supervisor service to docker-compose with Traefik labels
- Add supervisor.ai.pivoine.art to Authelia protected domains
- Remove deprecated Flux-related files
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Co-Authored-By: Claude <noreply@anthropic.com>
