Add Traefik port label for loadbalancer

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

docker-compose.yaml

@@ -27,6 +27,8 @@ services:
       - uploads:/var/www/html/web/app/uploads
     expose:
       - "8080"
+    labels:
+      - "traefik.http.services.wordpress.loadbalancer.server.port=8080"
     depends_on:
       - mariadb
       - redis