docker pull python:3-slim-bullseye
-- downloads it and runs it
docker run -it  python:3-slim-bullseye
--- exit
exit()
-- to run again
docker run -it  python:3-slim-bullseye
-- latest system
docker run -it node

--build a docke from dockerfile
docker build -f Dockerfile -t pyapp .
--run it with interactive terminal
docker run -it pyapp