Why domains is required for kubernetes module?

[RustamGimadiev]

Describe the bug
Unable use sak-kubernetes module without providing domains for docker proxy

╷
│ Error: Invalid index
│
│   on .terraform/modules/kubernetes/local.tf line 2, in locals:
│    2:   registry = "https://registry.${var.domains[0]}"
│     ├────────────────
│     │ var.domains is empty list of string
│
│ The given key does not identify an element in this collection value: the collection has no elements.

Use version
I use sak-kuberentes from master branch (provectus/sak-kubernetes@e6cf16d)

To Reproduce

module "kubernetes" {
  source = "github.com/provectus/sak-kubernetes?ref=e6cf16d2d0d86b5fc0d61ed431c5e8041471de1f"

  environment        = local.environment
  project            = local.project
  availability_zones = data.aws_availability_zones.current.zone_ids
  cluster_name       = "${local.environment}-${local.project}"
  vpc_id             = module.network.vpc_id
  subnets            = module.network.private_subnets
}

[akastav]

We need to use ingress because the registry required HTTPS connections. You can try to add insecure options for dockerconfig in kubernetes modules and use internal domain (http://registry..svc.cluster.local)

[RustamGimadiev]

maybe it is better to leave such values as default?