Expose docker reverse proxy

[jakubno]

Note

Adds docker reverse proxy named port to the API node pool and updates the LB backend to target both API and build instance groups.

• Network / Load Balancer:
  • Update backends.docker-reverse-proxy.groups in iac/provider-gcp/nomad-cluster/network/main.tf to include both var.api_instance_group and var.build_instance_group.
• Node Pools:
  • API: Add named_port for var.docker_reverse_proxy_port in iac/provider-gcp/nomad-cluster/nodepool-api.tf.
  • Build: Keep named_port for var.docker_reverse_proxy_port in iac/provider-gcp/nomad-cluster/nodepool-build.tf (no functional change).

^{Written by Cursor Bugbot for commit c33da90. This will update automatically on new commits. Configure here.}