fix: Change type of Terraform variable (#3)

* fix: Change type of Terraform variable

* docs: Generate README.md

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

README.md

@@ -67,7 +67,7 @@ No modules.
 | <a name="input_rescue"></a> [rescue](#input\_rescue) | Enable and boot in to the specified rescue system | `string` | `null` | no |
 | <a name="input_server_type"></a> [server\_type](#input\_server\_type) | Name of the server type this server should be created with | `string` | n/a | yes |
 | <a name="input_ssh_keys"></a> [ssh\_keys](#input\_ssh\_keys) | SSH key IDs or names which should be injected into the server at creation time | `list(string)` | `[]` | no |
-| <a name="input_subnet_id"></a> [subnet\_id](#input\_subnet\_id) | ID of the sub-network which should be added to the server | `number` | `null` | no |
+| <a name="input_subnet_id"></a> [subnet\_id](#input\_subnet\_id) | ID of the sub-network which should be added to the server | `string` | `null` | no |
 | <a name="input_user_data"></a> [user\_data](#input\_user\_data) | Cloud-Init user data to use during server creation | `string` | `null` | no |
 
 ## Outputs

variables.tf

@@ -104,7 +104,7 @@ variable "network_id" {
 }
 
 variable "subnet_id" {
-  type        = number
+  type        = string
   default     = null
   description = "ID of the sub-network which should be added to the server"
 }
@@ -113,4 +113,4 @@ variable "ip" {
   type        = string
   default     = null
   description = "IP to request to be assigned to this server"
-}
+}