fix(docker): keep the frontend image on upstream until it is published here

- backend and gateway images come from ghcr.io/evandrodevbr/opencodeui-{backend,gateway} (published)
- ghcr.io/evandrodevbr/opencodeui-frontend was never published (docker-frontend.yml failing since 2026-06-01), so the frontend keeps pulling ghcr.io/lehhair/opencodeui-frontend

docker-compose.standalone.yml

@@ -12,6 +12,8 @@
 
 services:
   frontend:
+    # Imagem do upstream: ghcr.io/evandrodevbr/opencodeui-frontend ainda não foi publicada
+    # (docker-frontend.yml falha desde 2026-06-01). Para build local use docker-compose.build.yml.
     image: ghcr.io/lehhair/opencodeui-frontend:latest
     container_name: opencodeui
     restart: unless-stopped