configure docker to push

Author: Álvaro Manera

.github/workflows/master.yml

@@ -35,6 +35,9 @@ jobs:
         version: ${{env.GCLOUD_VERSION}}
         service_account_key: ${{ secrets.ARTIFACTS_GCLOUD_ACCOUNT_BASE64 }}
 
+   - name: Configure docker
+      run: gcloud auth configure-docker
+
     - name: Upload image
       run: |
           docker push gcr.io/$ARTIFACTS_PROJECT_ID/sql-api:${GITHUB_REF##*/}