Change default log file location

files/config.example.toml

@@ -5,7 +5,7 @@
 # log_target = "stdout"  # default, "stdout", "syslog" or "file"
 # syslog_socket = "/dev/log"  # default
 # syslog_facility = "daemon"  # default
-# log_file = "/var/log/ddns-service.log"  # default, used if log_target = "file"
+# log_file = "/var/log/ddns-service/ddns-service.log"  # default, used if log_target = "file"
 # log_file_size = 52428800  # default, 50 MB in bytes
 # log_versions = 5  # default, 5 backup files
 # log_requests = false  # default