make domain name definition a function of the vm name

multiple/shared_modules/network.tf

@@ -1,7 +1,7 @@
 resource "libvirt_network" "tf_libvirt_network" {
   name = "${var.vm_name}-network"
   mode = var.network_mode
-  domain = var.network_domain
+  domain = local.computed_network_domain
   addresses = var.network_addresses
   
   dns {

multiple/shared_modules/variables.tf

@@ -73,12 +73,6 @@ variable "vcpu" {
   default     = 1
 }
 
-variable "network_name" {
-  description = "Name of the network"
-  type        = string
-  default     = "tf"
-}
-
 variable "network_mode" {
   description = "Network mode (nat, none, route, open, bridge)"
   type        = string
@@ -86,9 +80,10 @@ variable "network_mode" {
 }
 
 variable "network_domain" {
-  description = "Domain name for the network"
+  description = "Domain name for the network (derived from vm_name)"
   type        = string
-  default     = "tf.local"
+  # Default dynamically based on vm_name
+  default = ""
 }
 
 variable "network_addresses" {
@@ -138,3 +133,8 @@ variable "uefi_nvram_file_suffix" {
   type        = string
   default     = ""
 }
+
+# Computed variable for network domain (derived from vm_name)
+locals {
+  computed_network_domain = var.network_domain != "" ? var.network_domain : "${var.vm_name}.local"
+}