Written on Java 17. Make sure that your JAVA_HOME points to a JDK 17 distribution.
> ./mvnw spring-boot:run
> curl -X POST http://localhost:8080/comments -H 'Content-Type: application/json' -d '{"body": "hello"}'
> curl -X GET http://localhost:8080/comments/61be4bf82c932665b33febb9