4.0.0 org.springframework.boot spring-boot-starter-parent 3.3.1 ru.redrise.example demo 0.0.1-SNAPSHOT demo Demo project for Spring Boot 21 org.springframework.boot spring-boot-starter-validation org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-devtools runtime true org.springframework.boot spring-boot-maven-plugin