fixing missing paths

docs/source/index.rst

 .. mbtrack2 documentation master file, created by
-   sphinx-quickstart on Sun Apr 28 19:57:17 2024.
+   sphinx-quickstart on Sun Apr 28 21:46:15 2024.
    You can adapt this file completely to your liking, but it should at least
    contain the root `toctree` directive.
 
@@ -7,9 +7,10 @@ Welcome to mbtrack2's documentation!
 ====================================
 
 .. toctree::
-   :maxdepth: 2
+   :maxdepth: 4
    :caption: Contents:
 
+   mbtrack2
 
 
 Indices and tables