add file logger

.gitignore

@@ -2,4 +2,5 @@
 .env
 parse.py
 unparsed_catalog.json
-__pycache__
+__pycache__
+logs

logger.py

@@ -2,6 +2,11 @@ import logging
 
 logger = logging.getLogger('demo')
 logger.setLevel(logging.DEBUG)
-handler = logging.StreamHandler()
-handler.setLevel(logging.DEBUG)
-logger.addHandler(handler)
+
+stream_handler = logging.StreamHandler()
+stream_handler.setLevel(logging.DEBUG)
+logger.addHandler(stream_handler)
+
+file_handler = logging.FileHandler('logs')
+file_handler.setFormatter(logging.Formatter("%(asctime)s - %(filename)s:%(lineno)d - %(message)s", datefmt="%Y-%m-%d %H:%M:%S"))
+logger.addHandler(file_handler)