moved zones to required attribute. (#17)

* moved zones to required attribute

* defaulting zones

README.md

@@ -224,11 +224,19 @@ Default: `null`
 
 ### <a name="input_firewall_zones"></a> [firewall\_zones](#input\_firewall\_zones)
 
-Description: (Optional) Specifies a list of Availability Zones in which this Azure Firewall should be located. Changing this forces a new Azure Firewall to be created.
+Description: (Required) Specifies a list of Availability Zones in which this Azure Firewall should be located. Changing this forces a new Azure Firewall to be created.
 
 Type: `set(string)`
 
-Default: `null`
+Default:
+
+```json
+[
+  "1",
+  "2",
+  "3"
+]
+```
 
 ### <a name="input_lock"></a> [lock](#input\_lock)
 

examples/multi-addresses/README.md

@@ -70,6 +70,7 @@ resource "azurerm_public_ip" "public_ip" {
   allocation_method   = "Static"
   sku                 = "Standard"
   public_ip_prefix_id = azurerm_public_ip_prefix.public_ip_prefix.id
+  zones               = ["1", "2", "3"]
 }
 
 # This is the module call

examples/multi-addresses/main.tf

@@ -64,6 +64,7 @@ resource "azurerm_public_ip" "public_ip" {
   allocation_method   = "Static"
   sku                 = "Standard"
   public_ip_prefix_id = azurerm_public_ip_prefix.public_ip_prefix.id
+  zones               = ["1", "2", "3"]
 }
 
 # This is the module call

variables.tf

@@ -27,6 +27,12 @@ variable "firewall_sku_tier" {
   nullable    = false
 }
 
+variable "firewall_zones" {
+  type        = set(string)
+  default     = ["1", "2", "3"]
+  description = "(Required) Specifies a list of Availability Zones in which this Azure Firewall should be located. Changing this forces a new Azure Firewall to be created."
+}
+
 variable "firewall_dns_servers" {
   type        = list(string)
   default     = null
@@ -113,12 +119,6 @@ variable "firewall_virtual_hub" {
 EOT
 }
 
-variable "firewall_zones" {
-  type        = set(string)
-  default     = null
-  description = "(Optional) Specifies a list of Availability Zones in which this Azure Firewall should be located. Changing this forces a new Azure Firewall to be created."
-}
-
 variable "lock" {
   type = object({
     name = optional(string, null)