demo: git push developer workflows

Demo for roughly this copy:

> SSH allows Cmd.io commands to be used as Git remotes to push to:
ssh://progrium@cmd.io/deploy-cmd/repository/path
> Repository path patterns can be used to route different remotes to different commands. Maybe you have a deploy remote, but also a test remote that can orchestrate more complex testing of your source before pushing it to the main repository.

Try to work with this form factor:
https://placeholdit.imgix.net/~text?txtsize=33&txt=400%C3%97200&w=400&h=200