Docker exercises

• Exercise 0 - Install Docker
• Exercise 1 - Basic Dockerfile
• Exercise 2 - Environment variables and exposing ports

Useful commands

Description	Command
List running containers	docker ps
List downloaded images	docker image ls
Remove unused images (will free up a lot of disk space!)	docker image prune -a
Build an image	docker build . -t imagename:tag
Run a container	docker run --rm -it imagename:tag
Run a container with a file share ("volume")	docker run -v /path/to/share:/path/in/container --rm -it imagename:tag
Run a container and map port 8000 on the host to port 4444 in the container	docker run -p 8000:4444 --rm -it imagename:tag