4.0.0 org.springframework.boot spring-boot-starter-parent 3.4.1 com.printcalculator backend 0.0.1-SNAPSHOT print-calculator-backend Print Calculator Backend in Java 21 org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-devtools runtime true org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin