Add SERVICE_DEFINITIONS list with Radarr, Sonarr, SABnzbd, Jellyfin, Seerr, Prowlarr, Easynews as Indexer, qBittorrent, Bazarr, Lingarr, LibreTranslate, Sonarr-Prowlarr Proxy, Radarr-Prowlarr Proxy, and Dashboard. Add check_service() to perform HTTP/API health checks with configurable timeout. Add refresh_services() to run checks in parallel using service_check_executor ThreadPoolExecutor with 16 workers.
Add .env.example template with all configuration options (Radarr, Sonarr, SABnzbd). Move environment variables from docker-compose.yml to .env file for easier configuration management. Add .gitignore for .env, data/, and Python cache files. Update README with setup instructions for copying .env.example and configuring services. Replace hardcoded volume paths with environment variables in docker-compose.yml.
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