actions: config docker with devbox

Author: prestoncabe

.github/workflows/test-devbox.yml

@@ -49,6 +49,9 @@ jobs:
       - name: 'Use gcloud CLI via Devbox'
         run: 'devbox run -- gcloud info'
 
+      - name: 'Config docker with devbox'
+        run: devbox run -- gcloud auth configure-docker ${{ env.REGION }}-docker.pkg.dev
+
       - name: 'Use gcloud CLI without Devbox'
         run: 'gcloud info'