Tic Tac Toe Game over the Internet | Java, WebSocket, Spring Boot, REST | Backend part

In this video, I show how to build a popular Tic Tac Toe game to play with friends over the Internet.
In this part of the video, we implement a Backend part with Spring Boot, Rest API, Websockets.

The link to the source code: https://github.com/caligula95/tic-tac-toe