docs: update quick start to use cookiecutter

docs/narr/install/quickstart.rst

@@ -14,31 +14,40 @@ From Generated Code
 -------------------
 
 Note that this section describes an app based on WuttaWeb (i.e. not
-just WuttJamaican).
+just WuttJamaican).  We'll name it "Poser" for sake of example.
 
-There is a tool to `generate new project code`_, on the Rattail Demo
-site.  Use it to download a ZIP file (e.g. ``poser.zip``) for your
-project.
-
-.. _generate new project code: https://demo.rattailproject.org/generated-projects/new/wutta
-
-Make a local :term:`virtual environment` for your project.
-
-Also make a new e.g. ``poser`` database in PostgreSQL (or MySQL).
-
-Unzip and install the source code to the virtual environment, then run
-the app installer:
+Make a parent folder for all source code:
 
 .. code-block:: sh
 
    mkdir -p ~/src
-   unzip ~/Downloads/poser.zip -d ~/src
 
-   cd /path/to/venv
+Make a :term:`virtual environment` for your project:
+
+.. code-block:: sh
+
+   cd /path/to/envs
+   python3 -m venv poser
+
+Make a new e.g. ``poser`` database in PostgreSQL (or MySQL).
+
+Install and run cookiecutter with wuttaweb template:
+
+.. code-block:: sh
+
+   cd /path/to/envs/poser
+   bin/pip install cookiecutter
+   bin/cookiecutter -o ~/src git+https://forgejo.wuttaproject.org/wutta/cookiecutter-wuttaweb
+
+Assuming you now have project code at ``~/src/poser`` then install
+that and run the app installer:
+
+.. code-block:: sh
+
    bin/pip install -e ~/src/poser
    bin/poser install
 
-Assuming all goes well, you can run the web app with:
+If all goes well, you can run the web app with:
 
 .. code-block:: sh