fix: Set api server ip ranges to empty per default

Author: dploeger

README.md

@@ -60,12 +60,6 @@ The following resources are used by this module:
 
 The following input variables are required:
 
-### api\_server\_ip\_ranges
-
-Description: The IP ranges to allow for incoming traffic to the server nodes. To disable the limitation, set an empty list as value.
-
-Type: `list(string)`
-
 ### default\_node\_pool\_k8s\_version
 
 Description: Version of kubernetes for the default node pool
@@ -130,6 +124,14 @@ Type: `string`
 
 The following input variables are optional (have default values):
 
+### api\_server\_ip\_ranges
+
+Description: The IP ranges to allow for incoming traffic to the server nodes. To disable the limitation, set an empty list as value.
+
+Type: `list(string)`
+
+Default: `[]`
+
 ### availability\_zones
 
 Description: availability zones to spread the cluster nodes across, if omitted, only one avilability zone is used

vars.tf

@@ -166,6 +166,7 @@ variable "ssh_public_key" {
 variable "api_server_ip_ranges" {
   type        = list(string)
   description = "The IP ranges to allow for incoming traffic to the server nodes. To disable the limitation, set an empty list as value."
+  default     = []
 }
 
 variable "managed_identity_security_group" {