Revert "remove working-directory to build"

This reverts commit e3aa7a8e5b6ba1b077c1e3613aa8956a3ec0b0a2.

.github/workflows/reusable-app-prod.yml

@@ -70,6 +70,7 @@ jobs:
           dist-app-prod-${{ runner.OS }}-node${{ matrix.node-version }}-
 
     - name: Build
+      working-directory: ./apps/app
       run: |
         turbo run build
       env: