infra: fix CORS, add monitoring and dashboard labels

- Set ALLOWED_ORIGINS to production domain (fixes CORS for the web app)
- Add LOG_LEVEL=INFO to backend
- Add AutoKuma monitoring labels for Uptime Kuma auto-discovery
- Add Homepage dashboard labels (Productivity group)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

flight-comparator/docker-compose.yml

@@ -9,6 +9,8 @@ services:
     restart: unless-stopped
     environment:
       - DATABASE_PATH=/app/data/cache.db
+      - ALLOWED_ORIGINS=https://flights.domverse-berlin.eu
+      - LOG_LEVEL=INFO
     volumes:
       - flight-radar-data:/app/data
     networks:
@@ -28,6 +30,7 @@ services:
       - default   # shares default compose network with backend (nginx → http://backend:8000)
       - domverse  # Traefik discovers the container on this network
     labels:
+      # Traefik routing
       - "traefik.enable=true"
       - "traefik.http.routers.flight-radar.rule=Host(`flights.domverse-berlin.eu`)"
       - "traefik.http.routers.flight-radar.entrypoints=https"
@@ -35,6 +38,21 @@ services:
       - "traefik.http.routers.flight-radar.middlewares=authentik@docker"
       - "traefik.http.services.flight-radar.loadbalancer.server.port=80"
 
+      # AutoKuma monitoring
+      - "kuma.flight-radar.http.name=Flight Radar"
+      - "kuma.flight-radar.http.url=https://flights.domverse-berlin.eu"
+      - "kuma.flight-radar.http.interval=60"
+      - "kuma.flight-radar.http.max_retries=2"
+      - "kuma.flight-radar.http.retry_interval=60"
+
+      # Homepage dashboard
+      - "homepage.group=Productivity"
+      - "homepage.name=Flight Radar"
+      - "homepage.icon=mdi-airplane"
+      - "homepage.href=https://flights.domverse-berlin.eu"
+      - "homepage.description=Flight price comparison tool"
+      - "homepage.weight=20"
+
 volumes:
   flight-radar-data:
     driver: local