Docker HuB 이미지 올리기

1. Log in on https://hub.docker.com/
2. Click on Create Repository.
3. Choose a name (e.g. verse_gapminder) and a description for your repository and click Create.
4. Log into the Docker Hub from the command lin
5. sudo docker login --username=atozjames
6. Check the image ID  and tag your image
    docker tag bb38976d03cf atozjames/node_server:0.0.2
7. Push your image to the repository you created
8. sudo docker push atozjames/node_server