###Hello World docker image###

Build the image

docker build -t welcome .
docker run --name welcome -d -p 8080:8080 welcome

Login to docker hub

virt:~/git/welcome/sh$ docker login 
Username: devops-with-openshift
Password: 
Email:
WARNING: login credentials saved in /home/devops-with-openshift/.docker/config.json
Login Succeeded

Tag the image

docker tag -f welcome docker.io/devops-with-openshift/welcome

Push the image

docker push devops-with-openshift/welcome

Pull the image

docker pull devops-with-openshift/welcome