Docker training on Mac, 001

Take these steps, and, afterwards, try to understand how and why they worked, including flags/options "passed into" the command.

• install Docker for Mac
• verify install
• docker --version
• run basic container test
• docker run hello-world
• install iTerm2
• open a terminal window and split horizontally, then close
• open a terminal window and split vertically, then close
• run webserver
• open a terminal window and split horizontal
• in bottom pane, run: 
• watch -d -n7 docker ps -a
• as you take steps below, watch what changes occur in this window
• in top window, run:
• docker run -d -p 8080:80 --name mywebserver001 nginx
• open this in your web browser
• http://localhost:8080
• shut it down
• docker stop mywebserver001
• docker rm mywebserver001