The complete walk-through tutorial about this implementation, I've published blog post here:

Create interactive game with Spring Boot and WebSocket

The goal is to design and develop an interactive game by using Spring boot and WebSocket.

• Spring Boot
• WebSocket for getting changes and refreshing game board
• MongoDB for persisting the Game information
• HTML and js for providing simple UI and calling rest service
• Docker for containerization of services
• Docker-Compose to link the containers

First, you should build and package jar file with Maven. Then, I provided a docker file, so you should create an image. Finally, by the docker-compose file, you can launch it. Via the home page (https://localhost:8080/) you can access to the game UI.