Run jar file in docker image

There is a difference between images and containers.

• Images will be built ONCE
• You can start containers from Images

In your case:

Change your image:

FROM anapsix/alpine-java
MAINTAINER myNAME 
COPY testprj-1.0-SNAPSHOT.jar /home/testprj-1.0-SNAPSHOT.jar
CMD ["java","-jar","/home/testprj-1.0-SNAPSHOT.jar"]

Build your image:

docker build -t imageName .

Now invoke your program inside a container:

docker run --name myProgram imageName

Now restart your program by restarting the container:

docker restart myProgram

Your program changed? Rebuild the image!:

docker rmi imageName
docker build -t imageName .