Mountkirk Games, a company that makes online, session-based, multiplayer games for mobile platforms, is building a new popular game. They plan to deploy the game's backend on Google Compute Engine for streaming metrics, intensive analytics, autoscaling, and NoSQL database integration. Developers and testers can access each other's environments and resources, but not staging or production resources. The staging environment needs access to some production services. What should you do to isolate development environments from staging and production?