Your company has an application running as a Deployment in a Google Kubernetes Engine (GKE) cluster. This application is deployed across separate clusters for development, staging, and production environments. Recently, it was discovered that the team is able to bypass the development and staging environments and deploy a Docker image directly to the production cluster. While you want to maintain the team's autonomy, you need to enforce a process where deployments must be tested in the development and staging environments before reaching production. You are looking for a Google Cloud solution that can be implemented quickly and requires minimal effort. What should you do?