what is docker

Docker is a set of platform as a service products that use OS-level
virtualization to deliver software in packages called containers. 
Containers are isolated from one another and bundle their own software,
libraries and configuration files; they can communicate with each other
through well-defined channels.

docker ps # current containers
docker run # create and start the container
docker create # create container
dokcer exec # to run commnads in container for once
docker volume # create a docker volume
docker network # create a docker network
docker rm # remove container 
docker images # list the images
docker rmi # remove image
docker build # build a new image from dockerfile
docker push # push your image to docker repo
docker pull # download an image from docker repo
docker commit # create an image from container

Docker is the best tool you can use if you want to develope one single
application that can run and work uniformly at any environment, laptop
or public cloud instance thanks to its convergent virtualized packages
called containers!!

cheat sheet

https://github.com/lifeeric/docker-cheat-sheet

docker container ls -a
docker ps -a

docker container stop [ID]

docker container run -d -p 80:80 --name nginx-server nginx