Add Template to deploy forgejo.

This template allows deploying a forgejo en either Scaleway or Hetzner
(untested) without much knowledge about them.
It DOES require knowledge about Terragrunt and ansible. A wizard of
sorts is provided but it will not guarantee success without some
knowledge about the underlying technology.

terraform/hetzner/compute/terraform.tfvars.example

@@ -0,0 +1,12 @@
+# Hetzner Forgejo Server Configuration
+# Copy this file to terraform.tfvars and update with your values:
+#   cp terraform.tfvars.example terraform.tfvars
+
+# Server type (cpx21 = 4 vCPU, 8GB RAM | cpx31 = 8 vCPU, 16GB RAM)
+server_type = "cpx21"
+
+# SSH keys to add (leave empty to use all keys in account)
+# ssh_keys = ["my-key-name"]
+
+# Domain name for Forgejo
+# domain_name = "git.example.com"