Add link to docs

homeassistant/components/notify/file.py

@@ -17,12 +17,14 @@ Variables:
 
 filename
 *Required
-Name of the file to use. The file will be created if it doesn't exist and saved
-in your config/ folder.
+
 
 timestamp
 *Required
 Add a timestamp to the entry, valid entries are 1 or 0.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/notify.file.html
 """
 import logging
 import os