[ BAEL-5503 ] - Difference Between links and depends_on in Docker-Compose (#12503)

* updates pom-xml and adds Dockerfile to build a web-app image

* add depends-on vs links yml examples

docker-modules/docker-compose/Dockerfile

@@ -0,0 +1,4 @@
+FROM openjdk:11
+MAINTAINER baeldung.com
+COPY target/docker-compose-0.0.1-SNAPSHOT.jar app.jar
+ENTRYPOINT ["java","-jar","/app.jar"]