fix to include files without extension

arkindex_worker/git.py

@@ -351,7 +351,10 @@ class GitHelper:
         while keeping the same directory structure
         """
         file_count = 0
-        for file in export_out_dir.rglob("*.*"):
+        file_names = [
+            file_name for file_name in export_out_dir.rglob("*") if file_name.is_file()
+        ]
+        for file in file_names:
             rel_file_path = file.relative_to(export_out_dir)
             out_file = self.export_path / rel_file_path
             if not out_file.exists():