Bugfix: missing dependency

main.py

@@ -7,6 +7,7 @@ from lib.indexer import index_docs
 from lib.reindexer import reindexer
 from lib.alias_setter import alias_setter
 from lib.index_cleaner import index_cleaner
+from lib.ghost_content_getter import get_all_content_by_page
 
 import logging
 logging.root.handlers = []