Fix(docker): optimize pnpm build and explicitly set image tag

- Update Dockerfile:
  - Add `package-import-method copy` to pnpm config to resolve EAGAIN errors during build.
  - Optimize pnpm network concurrency settings.
- Update docker-compose.yml:
  - Explicitly set `image: hotwa/bttoxin-app:latest` for services.

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

docker-compose.yml

@@ -30,6 +30,7 @@ services:
       - frontend
 
   bttoxin:
+    image: hotwa/bttoxin-app:latest
     build:
       context: .
       dockerfile: docker/dockerfiles/Dockerfile.traefik
@@ -76,6 +77,7 @@ services:
       - "traefik.http.middlewares.redirect-to-https.redirectscheme.permanent=true"
 
   worker:
+    image: hotwa/bttoxin-app:latest
     build:
       context: .
       dockerfile: docker/dockerfiles/Dockerfile.traefik