add hetzner server module

modules/hetzner_server/main.tf

@@ -0,0 +1,40 @@
+terraform {
+  required_version = ">= 1.0.0"
+  required_providers {
+    hcloud = { source = "hetznercloud/hcloud", version = "~> 1.68.0" }
+  }
+}
+
+locals {
+  # single naming scheme - propagates everywhere
+  key_name      = "${var.name}-key"
+  firewall_name = "${var.name}-fw"
+}
+
+resource "hcloud_ssh_key" "this" {
+  name       = local.key_name
+  public_key = var.ssh_public_key
+}
+
+resource "hcloud_firewall" "this" {
+  name = local.firewall_name
+
+  dynamic "rule" {
+    for_each = var.firewall_rules
+    content {
+      direction  = rule.value.direction
+      protocol   = rule.value.protocol
+      port       = rule.value.port
+      source_ips = rule.value.source_ips
+    }
+  }
+}
+
+resource "hcloud_server" "this" {
+  name         = var.name
+  image        = var.image
+  server_type  = var.server_type
+  location     = var.location
+  user_data    = var.user_data
+  firewall_ids = [hcloud_firewall.this.id]
+}