Docker

Commands	Descriptions
docker pull [image]:[tag]	Pulls an image from a registry. Eg. docker pull php:7.3 will pull an image of PHP version 7.3
docker build .	Build an image from a Dockerfile
docker build -t <tag> .	Build an image and assign it a tag. Eg., docker build -t myapp:v1 .
docker ps	List all running containers
docker ps -a	List all containers including stopped containers
docker container prune	Remove all stopped containers
docker cp <container id>:<file path within container> <host path>	Copy file from container to host. Eg., docker cp app-postgres:/tmp/backup.sql ~/