Created index.html using Django templates

I created index.html using Django templates. Changes made:
1. Created templates directory inside the TrackCat project
2. Created a basic index.html inside templates directory
3. Defined location of templates in settings.py ( look absolute path for TEMPLATE_DIRS inside http://www.djangobook.com/en/2.0/chapter04.html)
4. Used function render_to_response instead of Http_response in views.py 

Thanks for reviewing!
it's still not at the beginning of the file, together with other import statements :smile: 

also, are you sure we need to import os.path at all? I don't see path being used anywhere directly; as far as I can tell, os.path is being referenced, so os needs to be imported, not os.path