Need to support deploy to on-premise machines

[platfowner]

We need to support deploy to on-premise machines.

[platfowner]

GCP ref docs:

• https://cloud.google.com/load-balancing/docs/negs
• https://cloud.google.com/load-balancing/docs/negs/internet-neg-concepts
• https://cloud.google.com/load-balancing/docs/proxy-only-subnets
• https://cloud.google.com/nat/docs/set-up-manage-network-address-translation