Ensure only selected container registries are allowed through Google Binary Authorization Policy

Container platforms within Google Cloud can make use of the Binary Authorization Policy, which would set software-level supply chain security for container images being used. This can help protect environments by reducing the risk of using unauthorized or vulnerable/malicious software. To learn more, see the GCP documentation.
References:
https://cloud.google.com/binary-authorization/docs/overview

In GCP Console -

1. Open the GCP Portal and Go to the Binary Authorization.
2. Click on Edit policy.
3. In the Images exempt from this policy, enter a pattern to whitelist.
4. Click Save Policy.

In Terraform -

1. In the resource google_binary_authorization_policy, ensure that admission_whitelist_patterns.name_pattern contains any images to exempt.

References:
https://cloud.google.com/binary-authorization/docs/key-concepts#exempt_images
https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/binary_authorization_policy#evaluation_mode