Fix port conflict on Coolify host: map to 8090 instead of 8080

Coolify deployment failed with "port is already allocated" since 8080
was already bound by another resource on the host. Container still
listens on 8080 internally; host mapping moved to 8090.

docker-compose.yml

@@ -2,7 +2,7 @@ services:
   app:
     build: .
     ports:
-      - "8080:8080"
+      - "8090:8080"
     volumes:
       - data:/app/server/data
     restart: unless-stopped