Update README to describe the dev setup

README.rst

@@ -32,6 +32,20 @@ Installation
 
    pip install aiodocker
 
+
+Development
+===========
+
+Create a virtualenv (either using ``python -m venv``, ``pyenv`` or your
+favorite tools) and install in the editable mode with ``ci`` and ``dev`` optional
+dependency sets.
+
+.. code-block:: sh
+
+   pip install -U pip
+   pip install -e '.[ci,dev]'  # in zsh, you need to escape brackets
+
+
 Documentation
 =============