Implementing REST API #2 episodes

[hvitis]

This issue is about implementing DRF
https://www.django-rest-framework.org/

In order to proceed with the roadmap of running the app with separate fron-end and not monolithic structure we need to start with implementing GET public endpoints.

The app will be used by 2 types of users:

• Readers/Listeners that should only have GET access and see the content
• Admin/Owner that should publish and edit.

We can preserve Admin ready to use Django´s Admin panel at
{{URL}}/admin
and proceed with just starting with a READ-only app.

So after adding DRF the endpoints should be created:

GET episodes
GET episodes/

with good practices

https://hackernoon.com/restful-api-designing-guidelines-the-best-practices-60e1d954e7c9
https://swagger.io/blog/api-design/api-design-best-practices/