Add read the docs and badge to readme

Author: davisnando

README.rst

@@ -15,6 +15,9 @@ Status
 .. image:: https://img.shields.io/pypi/v/django-cognito-jwt.svg
  :target: https://pypi.python.org/pypi/django-cognito-jwt/
 
+.. image:: https://readthedocs.org/projects/django-cognito-jwt/badge/?version=latest
+ :target: https://django-cognito-jwt.readthedocs.io/en/latest/?badge=latest
+ :alt: Documentation Status
 
 Installation
 ============

docs/index.rst

@@ -9,3 +9,28 @@ Installation
 .. code-block:: shell
 
  pip install django_cognito_jwt
+
+
+Usage
+=====
+
+Add the following lines to your Django settings.py file:
+
+.. code-block:: python
+
+ COGNITO_AWS_REGION = '<aws region>' # 'eu-central-1'
+    COGNITO_USER_POOL = '<user pool>' # 'eu-central-1_xYzaq'
+    COGNITO_AUDIENCE = '<client id>' 
+
+Also update the rest framework settings to use the correct authentication backend:
+
+.. code-block:: python
+
+ REST_FRAMEWORK = {
+ 'DEFAULT_AUTHENTICATION_CLASSES': [
+ ...
+ 'django_cognito_jwt.JSONWebTokenAuthentication',
+ ...
+ ],
+ ...
+ }