Update Index.rst to include mention of development contexts (#5931)

* Update Index.rst to include mention of development contexts

Suggested changes to detail potential ways to use backend debug mode in development contexts.

* Update Documentation/ApiOverview/Debugging/Index.rst

Co-authored-by: Sarah McCarthy <[email protected]>

---------

Co-authored-by: Lina Wolf <[email protected]>
Co-authored-by: Sarah McCarthy <[email protected]>

Author: 3 people

Documentation/ApiOverview/Debugging/Index.rst

@@ -33,6 +33,8 @@ To display additional debug information in the backend, set
 in :file:`config/system/settings.php` and log in with an administrator
 account.
 
+In a development context you may want to set debug mode to true for extended periods. This can be achieved by altering the setting in :file:`config/system/additional.php`. To prevent deploying to production, you can use an environment variable or check the environment context before overriding the setting in :file:`config/system/settings.php`.
+
 It shows for example the names of fields and in case of select, radio and
 checkbox fields the values in addition, which are generated by the
 :ref:`FormEngine <FormEngine>`. These can be used to set access permissions or