Jib can also build your image directly.
$ ./gradlew jibDockerBuild
Docker image is created
$ docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
springboot-jib-demo 0.0.1-SNAPSHOT fcd49c0fb403 11 minutes ago 135MB
docker container run -p 8080:8080 -it springboot-jib-demo:0.0.1-SNAPSHOT
$ curl http://localhost:8080
> Hello, Jib