extend description

Co-authored-by: Andriy Knysh <[email protected]>

Author: Matthias Fuhrmeister

modules/vpc/variables.tf

@@ -124,7 +124,12 @@ variable "nat_instance_type" {
 
 variable "nat_instance_ami_id" {
   type        = list(string)
-  description = "AMI Ids of the nat router"
+ description = <<-EOT
+    A list optionally containing the ID of the AMI to use for the NAT instance.
+    If the list is empty (the default), the latest official AWS NAT instance AMI
+    will be used. NOTE: The Official NAT instance AMI is being phased out and
+    does not support NAT64. Use of a NAT gateway is recommended instead.
+    EOT
   default     = []
 }