Google App Engine Standard Will Use Google Cloud Build After November 30, 2019

Got this email today: Hello Google App Engine Customer, We’re writing to remind you that after November 30, 2019, App Engine Standard will use Google Cloud Build during deployments to build your code into a container before running it on our platform. Cloud Build requires all projects to be linked to a billing instrument (for example, a credit card), so please ensure your projects containing App Engine applications are linked to a billing account with a valid billing instrument. Applications without billing instruments will be unable to deploy after November 30, 2019.