4.0.0 org.springframework.boot spring-boot-starter-parent 2.3.3.RELEASE com.fjordtek chapter0_helloworld 0.0.1-SNAPSHOT chapter0_helloworld Very simple Hello World app 1.8 org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-devtools runtime true org.springframework.boot spring-boot-starter-test test org.junit.vintage junit-vintage-engine org.springframework.boot spring-boot-maven-plugin