Working Landing Zone.

modules/network/variables.tf

@@ -0,0 +1,20 @@
+variable "name" {
+  description = "The name of the network."
+  type        = string
+}
+
+# A Cloud NAT will be created in the same region as the first subnet.
+variable "subnets" {
+  description = "A list of subnets with names and CIDRs."
+
+  type = list(object({
+    name   = string
+    cidr   = string
+    region = string
+  }))
+
+  validation {
+    condition     = var.subnets[0].region != null
+    error_message = "The region for the first subnet must be specified."
+  }
+}