Add explicit Traefik labels with port 8080

Coolify needs explicit loadbalancer.server.port label to know
which port to route traffic to.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docker-compose.yaml

@@ -27,6 +27,12 @@ services:
       - uploads:/var/www/html/web/app/uploads
     expose:
       - "8080"
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.wp-island.rule=Host(`kurse.islandpferde-melanieworbs.de`)"
+      - "traefik.http.routers.wp-island.entrypoints=https"
+      - "traefik.http.routers.wp-island.tls.certresolver=letsencrypt"
+      - "traefik.http.services.wp-island.loadbalancer.server.port=8080"
     depends_on:
       - mariadb
       - redis