proposal for "back to overview"

src/doc/index.rst

@@ -14,13 +14,18 @@ Welcome to PyCaosDB's documentation!
    Administration <administration>
    High Level API <high_level_api>
    Code gallery <gallery/index>
-   API documentation<_apidoc/caosdb>
+   API documentation <_apidoc/caosdb>
+   Back to Overview <https://docs.indiscale.com/>
 
 This is the documentation for the Python client library for CaosDB, ``PyCaosDB``.
 
 This documentation helps you to :doc:`get started<README_SETUP>`, explains the most important
 :doc:`concepts<concepts>` and offers a range of :doc:`tutorials<tutorials/index>`.
 
+Or go back to the general `overview`_ of the documentation.
+
+.. _overview: https://docs.indiscale.com/
+
 
 Indices and tables
 ==================