add versions.tf

Signed-off-by: Jakub Sokołowski <jakub@status.im>

versions.tf

@@ -0,0 +1,8 @@
+
+terraform {
+  required_version = ">= 0.12"
+  required_providers {
+    cloudflare   = " = 2.3.0"
+    digitalocean = " = 1.12.0"
+  }
+}