Prevent Hetzner from modifying the "sshd_config" file

packer/hetzner/seed/user-data

@@ -0,0 +1,7 @@
+#cloud-config
+
+ssh_pwauth: false
+disable_root: false
+
+runcmd:
+  - sed -i '/ssh_pwauth/d' /etc/cloud/cloud.cfg.d/*-hetznercloud.cfg

packer/sources.pkr.hcl

@@ -9,6 +9,8 @@ source "hcloud" "main" {
     service = "wireguard"
   }
 
+  user_data_file = "./hetzner/seed/user-data"
+
   ssh_port = "22"
   ssh_username = "root"
   ssh_timeout = "10m"