Update _config.yml

Added sample footer and "back to top" button

_config.yml

@@ -92,3 +92,14 @@ search:
   button: false
   # Focus the search input by pressing `ctrl + focus_shortcut_key` (or `cmd + focus_shortcut_key` on macOS)
   focus_shortcut_key: "k"
+
+  # Footer content
+# appears at the bottom of every page's main content
+# Note: The footer_content option is deprecated and will be removed in a future major release. Please use `_includes/footer_custom.html` for more robust
+markup / liquid-based content.
+footer_content: "Copyright &copy; 2017-2020 Patrick Marsceill. Distributed by an <a href=\"https://github.com/just-the-docs/just-the-docs/tree/main/LICENSE.txt\">MIT license.</a>"
+
+back_to_top: true
+back_to_top_text: "Back to top"
+
+