docs: Improve Developer Documentation index page

- Improved readability.
- Changed hierarchy of headings.
- Reduced emphasis on unnecessary/redundant things.
- Added links to go back to the main websites.

Signed-off-by: Joseph Nuthalapati <njoseph@riseup.net>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

doc/dev/index.rst

@@ -1,18 +1,22 @@
 .. SPDX-License-Identifier: CC-BY-SA-4.0
 
-FreedomBox Developer Documentation
-==================================
-
-**Note:** If you are looking for documentation on using FreedomBox, please visit
-the `FreedomBox Manual <https://wiki.debian.org/FreedomBox/Manual>`__. You can
-also find a copy of the user manual in the help section of your FreedomBox.
+Developer Documentation
+=========================
 
 This manual is meant for developers intending to develop apps for FreedomBox.
 It provides an API reference and a step-by-step tutorial for developing apps.
 
+
+  **Note:** If you are looking for documentation on using FreedomBox, please visit
+  the `FreedomBox Manual <https://wiki.debian.org/FreedomBox/Manual>`_. You can
+  also find a copy of the user manual in the help section of your FreedomBox.
+
+********
+Contents
+********
+
 .. toctree::
    :maxdepth: 2
-   :caption: Contents
 
    tutorial/index
    reference/index
@@ -30,16 +34,24 @@ External References
 
 #. `FreedomBox User Manual <https://wiki.debian.org/FreedomBox/Manual>`_
 
-Contributing to this Documentation
-**********************************
-
-.. toctree::
-
-   README
-
-Indices and tables
-******************
+Indices
+*******
 
 * :ref:`genindex`
 * :ref:`modindex`
-* :ref:`search`
+
+Meta
+****
+
+.. toctree::
+   :maxdepth: 1
+
+   README
+
+********
+Websites
+********
+
+* `FreedomBox <https://freedombox.org>`_
+
+* `FreedomBox Foundation <https://www.freedomboxfoundation.org>`_