docs: A little cleanup and added some gdb examples.

docs: Added section on running VPP for developers.

Change-Id: I98b5c6f1c9fee60b297e3947e78ec33f950f598a
Signed-off-by: andrew <andrew.olechtchouk@gmail.com>

docs/gettingstarted/developers/running_vpp.rst

@@ -0,0 +1,40 @@
+.. _running_vpp:
+
+.. toctree::
+
+Running VPP
+===========
+
+After build the VPP binaries, there a several to run the images you've built. These is useful when
+if you need to run VPP without  installing the packages. For instance if you want to run VPP with GDB.
+
+Without GDB
+_________________________
+
+To run the VPP images, that you've build without GDB.
+
+Running the release image:
+
+.. code-block:: console
+
+   # make run-release
+   #
+
+With GDB
+_________________________
+
+With the following commands you can run VPP and then be dropped into the GDB prompt.
+
+Running the release image:
+
+.. code-block:: console
+
+   # make debug-release
+   (gdb)
+
+Running the debug image:
+
+.. code-block:: console
+
+   # make debug
+   (gdb)