separate packaging guide into steps

site/source/service-packaging/build-package-example/07_create-s9pk.rst

@@ -0,0 +1,23 @@
+.. _packaging-create-s9pk:
+
+==========================
+Step 7 - Package into s9pk
+==========================
+
+We now have all of the necessary components to package the service into the format needed for the OS. This format is a custom filetype with an extension of ``.s9pk``, short for Start9 Package. 
+
+To package all components into an ``.s9pk``, run the following command from the root of your project directory:
+
+.. code:: bash
+
+    embassy-sdk pack
+
+Let's also make sure to verify the validity of the package:
+
+.. code:: bash
+
+    embassy-sdk verify s9pk /path/to/hello-world.s9pk
+
+If anything goes wrong, an error message will indicate the missing component or other failure.
+
+**That's it!**