Add Dynu Terraform brownfield DNS documentation layer

infrastructure/terraform/dynu/variables.tf

@@ -0,0 +1,20 @@
+variable "dynu_api_key" {
+  description = "Dynu API key/token used by the Dynu Terraform provider."
+  type        = string
+  sensitive   = true
+  default     = null
+}
+
+variable "dynu_username" {
+  description = "Optional Dynu username, only if required by the provider."
+  type        = string
+  sensitive   = true
+  default     = null
+}
+
+variable "dynu_password" {
+  description = "Optional Dynu password, only if required by the provider."
+  type        = string
+  sensitive   = true
+  default     = null
+}