adjust docs

modules/vpc/README.md

@@ -120,7 +120,7 @@ components:
 | <a name="input_namespace"></a> [namespace](#input\_namespace) | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | `string` | `null` | no |
 | <a name="input_nat_eip_aws_shield_protection_enabled"></a> [nat\_eip\_aws\_shield\_protection\_enabled](#input\_nat\_eip\_aws\_shield\_protection\_enabled) | Enable or disable AWS Shield Advanced protection for NAT EIPs. If set to 'true', a subscription to AWS Shield Advanced must exist in this account. | `bool` | `false` | no |
 | <a name="input_nat_gateway_enabled"></a> [nat\_gateway\_enabled](#input\_nat\_gateway\_enabled) | Flag to enable/disable NAT gateways | `bool` | `true` | no |
-| <a name="input_nat_instance_ami_id"></a> [nat\_instance\_ami\_id](#input\_nat\_instance\_ami\_id) | AMI Ids of the nat router | `list(string)` | `[]` | no |
+| <a name="input_nat_instance_ami_id"></a> [nat\_instance\_ami\_id](#input\_nat\_instance\_ami\_id) | A list optionally containing the ID of the AMI to use for the NAT instance.<br>If the list is empty (the default), the latest official AWS NAT instance AMI<br>will be used. NOTE: The Official NAT instance AMI is being phased out and<br>does not support NAT64. Use of a NAT gateway is recommended instead. | `list(string)` | `[]` | no |
 | <a name="input_nat_instance_enabled"></a> [nat\_instance\_enabled](#input\_nat\_instance\_enabled) | Flag to enable/disable NAT instances | `bool` | `false` | no |
 | <a name="input_nat_instance_type"></a> [nat\_instance\_type](#input\_nat\_instance\_type) | NAT Instance type | `string` | `"t3.micro"` | no |
 | <a name="input_public_subnets_enabled"></a> [public\_subnets\_enabled](#input\_public\_subnets\_enabled) | If false, do not create public subnets.<br>Since NAT gateways and instances must be created in public subnets, these will also not be created when `false`. | `bool` | `true` | no |

modules/vpc/variables.tf

@@ -124,7 +124,7 @@ variable "nat_instance_type" {
 
 variable "nat_instance_ami_id" {
   type        = list(string)
- description = <<-EOT
+  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