variable "customer_id" { description = "The unique ID for the customer." type = string } variable "project_id" { description = "The project ID to deploy the resources to." type = string } variable "region" { description = "The region to deploy the resources to." type = string default = "europe-west1" } variable "billing_account_id" { description = "The billing account ID to associate with the project." type = string } variable "alert_email" { description = "The email address for billing alerts." type = string } variable "billing_viewer_emails" { description = "A list of user emails to be granted billing viewer role." type = list(string) } variable "container_image" { description = "The container image to deploy." type = string }