Docker images and containers

docker.txt

While you are in the mydockerbuild directory, build the image using the docker build command. 
The -t parameter gives your image a tag, so you can run it more easily later.
Don’t forget the . command, which tells the docker build command to look in the current directory for a file called Dockerfile. 

docker build -t docker-whale .

docker images --> lists the images you have locally.

docker run docker-whale --> run image

docker tag 7d9495d03763 emarkosov/docker-whale:latest --> tag docker file

Pushing to Docker Hub:
docker login
docker push emarkosov/docker-whale:lates


docker rmi -f 7d9495d03763  --> removes the image
docker run emarkosov/docker-whale:latest --> If the image is no longer available on your local system, Docker downloads it.