Add link to the getting started guide

Author: stsewd

readthedocs/doc_builder/base.py

@@ -110,6 +110,9 @@ def create_index(self, extension='md', **__):
 under the root (or ``/docs``) directory in your repository.
 
 If you want to use another markup, choose a different builder in your settings.
+Check out our `Getting Started Guide
+<https://docs.readthedocs.io/en/latest/getting_started.html>`_ to become more
+familiar with Read The Docs.
                 """
 
                 index_file.write(index_text.format(dir=docs_dir, ext=extension))