Add Docker, rewrite design to MUI, add autotests

I've done a huge refactoring and rethinking of the code, I've added such a wonderful thing as Docker to the project! Also, I wrote autotests for most of the applications, the entire design of the React client part was rewritten on MUI, the ability for the user to choose a birthday and a city was added, the registration part was completely completed, the client part code also underwent refactoring and rethinking, Docker gave us the opportunity to use PostgreSQL as a database, and as a backend for caching - Redis.

The next step will be the implementation of the login for the client part, then we will completely pass the authentication stage, and proceed to the development of the feed for the client part. Follow the news.

Rewrite main to REST

The main application has been rewritten to REST, which means that the backend part of the social network feed is complete!

Since main is a fairly large application, I can't guarantee that there isn't a bug lurking somewhere!

Now I tested it manually, in my opinion everything works, but again, I can't guarantee, I will definitely write autotests, but for now, if you find a bug, open a new issue

Now we have to work on the frontend part.

Before rewrite main app to REST

The rewriting of the main application on the rest framework is almost ready, after that, the backend part of the feed will be finished, and I will proceed to writing the frontend.

Stable release

This is a completely stable release of my social network, the next huge step in its development will be the transition to DRF integration with Vue.js. I believe that before such a big step, it is worth making a separate release.