Update docs contributing code block

docs/contributing.rst

@@ -155,14 +155,19 @@ To run the checks manually, run:
 Writing Docs
 ____________
 
-You can run the docs locally by running the following:
+`Hatch <https://hatch.pypa.io/latest/>`_ is a unified command-line tool for managing dependencies and environment isolation for Python developers. In Cosmos, we use a Hatchto declare the dependencies required for the project itself, as well as for tests and documentation builds.
+
+If you don’t already have Hatch installed, please `install it <https://hatch.pypa.io/latest/install/>`_ before proceeding. As an example, on macOS, you can do so with:
 
 .. code-block:: bash
+    brew install hatch
 
-    hatch run docs:serve
 
+You can run the docs locally by running the following:
+
+.. code-block:: bash
+    hatch run docs:serve
 
-This will run the docs server in a virtual environment with the right dependencies. Note that it may take longer on the first run as it sets up the virtual environment, but will be quick on subsequent runs.
 
 
 Building