Fix target group length (#74)

* Fix target group length

* Apply suggestions from code review

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* Fix readme

* Fix context source

* Rebuild README

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

README.md

@@ -90,10 +90,6 @@ We highly recommend that in your code you pin the version to the exact version y
 using so that your infrastructure remains stable, and update versions in a
 systematic way so that they do not catch you by surprise.
 
-Also, because of a bug in the Terraform registry ([hashicorp/terraform#21417](https://github.com/hashicorp/terraform/issues/21417)),
-the registry shows many of our inputs as required when in fact they are optional.
-The table below correctly indicates which inputs are required.
-
 
 For a complete example, see [examples/complete](examples/complete).
 
@@ -233,6 +229,7 @@ Available targets:
 
 | Name | Source | Version |
 |------|--------|---------|
+| <a name="module_target_group"></a> [target\_group](#module\_target\_group) | cloudposse/label/null | 0.25.0 |
 | <a name="module_this"></a> [this](#module\_this) | cloudposse/label/null | 0.25.0 |
 
 ## Resources

docs/terraform.md

@@ -16,6 +16,7 @@
 
 | Name | Source | Version |
 |------|--------|---------|
+| <a name="module_target_group"></a> [target\_group](#module\_target\_group) | cloudposse/label/null | 0.25.0 |
 | <a name="module_this"></a> [this](#module\_this) | cloudposse/label/null | 0.25.0 |
 
 ## Resources

main.tf

@@ -8,10 +8,17 @@ data "aws_lb_target_group" "default" {
   arn = local.target_group_arn
 }
 
+module "target_group" {
+  source          = "cloudposse/label/null"
+  version         = "0.25.0"
+  id_length_limit = 32
+  context         = module.this.context
+}
+
 resource "aws_lb_target_group" "default" {
   count = module.this.enabled && var.default_target_group_enabled ? 1 : 0
 
-  name             = coalesce(var.target_group_name, module.this.id)
+  name             = coalesce(var.target_group_name, module.target_group.id)
   port             = var.port
   protocol         = var.protocol
   protocol_version = var.protocol_version