[Feature]: Private GCP gateways

[peterschmidt85]

Problem

The https: false property in services is intended to allow running services on backends with public_ips: false.

Currently, https: false is only supported on AWS and cannot be used with GCP.

Solution

Support https: false for the GCP backend.

Workaround

No response

Would you like to help us implement this feature by sending a PR?

Yes

[jvstme]

Currently, https: false is only supported on AWS and cannot be used with GCP.

https: false is already supported for services on all gateways regardless of the backend. What is not supported is private GCP gateways, i.e. those with the public_ip: false gateway configuration property.

The objective of this issue is to support public_ip: false for GCP gateways. However, such gateways will only work for https: false services, since supporting certificate issuance for private GCP gateways is out of scope for this issue.