Change exposed port to 6969 to avoid Dokploy conflicts

- Update docker-compose.yml port mapping from 3000:3000 to 6969:3000
- Internal container port remains 3000 for Traefik compatibility

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

docker-compose.yml

@@ -6,7 +6,7 @@ services:
     container_name: brachnha-insights
     restart: unless-stopped
     ports:
-      - "3000:3000"
+      - "6969:3000"
     environment:
       - NODE_ENV=production
     networks: