How can you automate the migration of photo directories from the `webphotos-staging` Cloud Storage bucket to the `webphotos-prod` bucket when promoting a Node.js App Engine application from staging to production using Cloud Build?

Exam-Like

Manually copy the photos to webphotos-prod.

0.0%

Add a startup script in the application's app.yami file to move the photos from webphotos-staging to webphotos-prod.

19.0%

Add a build step in the cloudbuild.yaml file before the promotion step with the arguments:

32.8%

Add a build step in the cloudbuild.yaml file before the promotion step with the arguments:

48.3%

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