spring-boot/spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/docs/gradle/packaging/boot-build-image-name.gradle

plugins {
	id 'java'
	id 'org.springframework.boot' version '{gradle-project-version}'
}

// tag::image-name[]
bootBuildImage {
	imageName = "example.com/library/${project.name}"
}
// end::image-name[]

task bootBuildImageName {
    doFirst {
        println(tasks.bootBuildImage.imageName)
    }
}