✨ feat: Host a relay on Hetzner (#114)

We are hosting a [MoQ](https://quic.video) relay on a remote (bare
metal) server on Hetzner

With a lot of help from @victorpahuus

.certs/input.tf

@@ -0,0 +1,7 @@
+variable "email" {
+  description = "Your email address, used for LetsEncrypt"
+}
+
+variable "domain" {
+  description = "domain name"
+}