Improve documentation for Getting started with Docker (#4003)

Fix https://github.com/cookiecutter/cookiecutter-django/issues/3971

docs/developing-locally-docker.rst

@@ -3,9 +3,6 @@ Getting Up and Running Locally With Docker
 
 .. index:: Docker
 
-The steps below will get you up and running with a local development environment.
-All of these commands assume you are in the root of your generated project.
-
 .. note::
 
     If you're new to Docker, please be aware that some resources are cached system-wide
@@ -19,10 +16,16 @@ Prerequisites
 * Docker; if you don't have it yet, follow the `installation instructions`_;
 * Docker Compose; refer to the official documentation for the `installation guide`_.
 * Pre-commit; refer to the official documentation for the `pre-commit`_.
+* Cookiecutter; refer to the official GitHub repository of `Cookiecutter`_
 
 .. _`installation instructions`: https://docs.docker.com/install/#supported-platforms
 .. _`installation guide`: https://docs.docker.com/compose/install/
 .. _`pre-commit`: https://pre-commit.com/#install
+.. _`Cookiecutter`: https://github.com/cookiecutter/cookiecutter
+
+Before Getting Started
+----------------------
+.. include:: generate-project-block.rst
 
 Build the Stack
 ---------------

docs/developing-locally.rst

@@ -24,9 +24,8 @@ First things first.
 
     $ source <virtual env path>/bin/activate
 
-#. Install cookiecutter-django: ::
-
-    $ cookiecutter gh:cookiecutter/cookiecutter-django
+#.
+    .. include:: generate-project-block.rst
 
 #. Install development requirements: ::
 
@@ -43,6 +42,7 @@ First things first.
 #. Create a new PostgreSQL database using createdb_: ::
 
     $ createdb --username=postgres <project_slug>
+
    ``project_slug`` is what you have entered as the project_slug at the setup stage.
 
    .. note::

docs/generate-project-block.rst

@@ -0,0 +1,7 @@
+Generate a new cookiecutter-django project: ::
+
+    $ cookiecutter gh:cookiecutter/cookiecutter-django
+
+For more information refer to
+:ref:`Project Generation Options <template-options>`.
+