fix: Custom error responses

fixes breaking change by making custom error reponses optional as they should

README.md

@@ -52,7 +52,7 @@ No modules.
 | <a name="input_cloudfront_origin_description"></a> [cloudfront\_origin\_description](#input\_cloudfront\_origin\_description) | Description for the origin | `string` | n/a | yes |
 | <a name="input_cloudfront_origin_name"></a> [cloudfront\_origin\_name](#input\_cloudfront\_origin\_name) | The name of the cloudfront origin | `string` | n/a | yes |
 | <a name="input_cookies_forward"></a> [cookies\_forward](#input\_cookies\_forward) | cookies forwarding | `string` | `"none"` | no |
-| <a name="input_custom_error_responses"></a> [custom\_error\_responses](#input\_custom\_error\_responses) | Custom error response definitions | <pre>list(object({<br>    error_caching_min_ttl = optional(number)<br>    error_code            = optional(number)<br>    response_code         = optional(number)<br>    response_page_path    = optional(string)<br>  }))</pre> | n/a | yes |
+| <a name="input_custom_error_responses"></a> [custom\_error\_responses](#input\_custom\_error\_responses) | Custom error response definitions | <pre>list(object({<br>    error_caching_min_ttl = optional(number)<br>    error_code            = optional(number)<br>    response_code         = optional(number)<br>    response_page_path    = optional(string)<br>  }))</pre> | `null` | no |
 | <a name="input_default_root_object"></a> [default\_root\_object](#input\_default\_root\_object) | The default website root object | `string` | `null` | no |
 | <a name="input_default_ttl"></a> [default\_ttl](#input\_default\_ttl) | Default cache ttl | `number` | `1800` | no |
 | <a name="input_enable_distribution"></a> [enable\_distribution](#input\_enable\_distribution) | Enables the cf distributuion | `bool` | `true` | no |

main.tf

@@ -77,7 +77,7 @@ resource "aws_cloudfront_distribution" "this" {
   }
 
   dynamic "custom_error_response" {
-    for_each = var.custom_error_responses
+    for_each = var.custom_error_responses != null ? var.custom_error_responses : []
 
     content {
       error_caching_min_ttl = var.custom_error_responses[custom_error_response.key].error_caching_min_ttl

variables.tf

@@ -115,6 +115,7 @@ variable "custom_error_responses" {
     response_code         = optional(number)
     response_page_path    = optional(string)
   }))
+  default = null
 }
 
 variable "acm_certificate_arn" {