Simplify Caddy infrastructure to use file-based configuration instead of complex API registration system

docs/setup-guide.md

@@ -1,5 +1,4 @@
 # Setup guide
-
 ## Get a VPS with Arch Linux OS
 - We are using [Hostinger](https://hostinger.com)
 - Find it's IP in the Hostinger Dashboard
@@ -12,5 +11,5 @@
 ssh-copy-id -i ~/.ssh/id_ed25519.pub root@<VPS_IP>
 ```
 - Add host to Ansible inventory
-- Test connection `ansible -i inventory/hosts.yml arch-vps -m ping`
+- Test connection `ansible arch-vps -m ping`
 - ```ansible-playbook -i inventory/hosts/yml site.yml```