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/scaleway/compute/terraform.tfvars.example

@@ -0,0 +1,12 @@
+# Scaleway Forgejo Instance Configuration
+# Copy this file to terraform.tfvars and update with your values:
+#   cp terraform.tfvars.example terraform.tfvars
+
+# Instance type (DEV1-M = 4GB RAM, DEV1-L = 8GB RAM)
+instance_type = "DEV1-M"
+
+# Your SSH public key (contents of your ~/.ssh/id_ed25519.pub or similar)
+# ssh_public_key = "ssh-ed25519 AAAA... your-email@example.com"
+
+# Your domain name for Forgejo
+# domain_name = "git.example.com"