Add use cases miniapp to docs

docs/examples/index.rst

@@ -18,3 +18,4 @@ and powered by *Dependency Injector* framework.
     movie_lister
     services_miniapp
     bundles_miniapp
+    use_cases_miniapp

docs/examples/use_cases_miniapp.rst

@@ -0,0 +1,57 @@
+Use cases mini application example
+----------------------------------
+
+.. currentmodule:: dependency_injector.providers
+
+"Use cases" miniapp demonstrate usage of :py:class:`DependenciesContainer` 
+provider.
+
+Example application
+~~~~~~~~~~~~~~~~~~~
+
+"Use cases" mini application has next structure:
+
+.. code-block:: bash
+
+    use_cases/
+        example/               <-- Example package
+            __init__.py
+            adapters.py
+            use_cases.py
+        containers.py          <-- Dependency injection containers
+        run.py                 <-- Entrypoint
+
+
+IoC containers
+~~~~~~~~~~~~~~
+
+Listing of ``use_cases/containers.py``:
+
+.. literalinclude:: ../../examples/miniapps/use_cases/containers.py
+   :language: python
+   :linenos:
+
+Run application
+~~~~~~~~~~~~~~~
+
+Listing of ``run.py``:
+
+.. literalinclude:: ../../examples/miniapps/use_cases/run.py
+   :language: python
+   :linenos:
+
+Instructions for running:
+
+.. code-block:: bash
+
+    python run.py prod example@example.com  # Running in "production" environment
+    python run.py test example@example.com  # Running in "testing" environment
+
+Links
+~~~~~
+
++ `Dependency Injector <https://github.com/ets-labs/python-dependency-injector/>`_
++ `Full example sources <https://github.com/ets-labs/python-dependency-injector/tree/master/examples/miniapps/use_cases>`_
+
+
+.. disqus::

examples/miniapps/use_cases/README.rst

@@ -5,5 +5,5 @@ Instructions for running
 
 .. code-block:: bash
 
-    python run.py prod example@example.com
-    python run.py test example@example.com
+    python run.py prod example@example.com  # Running in "production" environment
+    python run.py test example@example.com  # Running in "testing" environment