add link to Github

index.rst

@@ -10,6 +10,8 @@ This is a `ROS2 interface package`_ for the Softbank NAO robot.
 Custom message types specific to the NAO robot are defined in
 this package, and are explained in these docs.
 
+The project is hosted on `Github`_.
+
 The :ref:`msgs` page explains all msg classes.
 
 The :ref:`joint_indexes` page explains how to handle NAO joints in detail.
@@ -24,4 +26,5 @@ The :ref:`joint_indexes` page explains how to handle NAO joints in detail.
    eye-led-indexes
    related-ros2-packages
 
-.. _ROS2 interface package: https://docs.ros.org/en/foxy/Tutorials/Custom-ROS2-Interfaces.html
+.. _ROS2 interface package: https://docs.ros.org/en/foxy/Tutorials/Custom-ROS2-Interfaces.html
+.. _Github: https://github.com/ijnek/nao_interfaces