sample docker file for JAVA application

 You can add following Dockerfile to JAVA docker image.

#Use open JDK 8 image as the base image
FROM openjdk:8

#Create a new app directory for my application files (Inside image file system)
RUN mkdir /app

#Set the directory for excuting future commands
WORKDIR /app

#Copy my application files from host machine into image file system
COPY target/docker-helloworld-1.0-SNAPSHOT.jar  app.jar

#Run jar file
ENTRYPOINT ["java","-jar","app.jar"]

#CMD java -jar app.jar