[Docker] Create and run a Java application Docker image

Before build the docker file, build the jar package:

mvn package -DskipTests=true

Dockerfile:

FROM java:8
WORKDIR /
ADD target/explorecali-2.0.0-SNAPSHOT.jar //
EXPOSE 8080
ENTRYPOINT [ "java", "-jar", "/explorecali-2.0.0-SNAPSHOT.jar"]