Add the log_file configuration parameter to the config example.

configuration-example.yml

@@ -4,6 +4,9 @@
 login: admin
 pass: secret
 
+# Path to the log file. By default, everything is just printed on screen.
+log_file: /var/log/baguette/auth.log
+
 # In case you have a special `mailer` application.
 # Read the manual to understand how it is invoked.
 mailer_exe: /usr/local/bin/my-special-mailer