For building a highly available application on GCP with automatic failover and zero-downtime deployments, which service is recommended?

*The App Engine Standard Environment is the recommended service for building a highly available application on GCP that requires automatic failover and zero-downtime deployments. App Engine Standard provides a fully managed platform that automatically handles failover and ensures continuous availability of applications. It enables seamless and effortless scaling and offers zero-downtime deployments, making it suitable for applications where high availability and reliability are paramount. While services like Compute Engine with Managed Instance Groups and Google Kubernetes Engine with Horizontal Pod Autoscaler offer high availability, they may require additional configurations for zero-downtime deployments. Cloud Functions and Cloud Run focus on event-driven and containerized applications, respectively, and do not inherently provide the same level of failover capabilities and deployment smoothness as App Engine Standard Environment.*