Add Dynu Terraform brownfield DNS documentation layer

infrastructure/terraform/dynu/versions.tf

@@ -0,0 +1,10 @@
+terraform {
+  required_version = ">= 1.6.0"
+
+  required_providers {
+    dynu = {
+      source  = "beatz174-bit/dynu"
+      version = ">= 0.1.0"
+    }
+  }
+}