Change default value of dns_server and mention that it has to be an IP

files/config.example.toml

@@ -25,7 +25,7 @@ path = "/var/lib/ddns-service/ddns.db"  # required for sqlite
 # database = "ddns"  # required for mariadb
 
 [dns_service]
-# dns_server = "localhost"  # default
+# dns_server = "127.0.0.1"  # default, must be IP address
 # dns_port = 53  # default
 # dns_timeout = 5  # default, seconds
 # ddns_default_key_file = "/etc/ddns-service/ddns.key"  # optional, BIND TSIG key