The purpose here is to give a bare bones example of a workflow that
doesn't even have any source code --- all of the necessary commands
are embedded in flo.yaml. This is important because
flo detects changes to the flo.yaml file. To see
this in action, execute flo run in this directory from the command
line, then modify any of the tasks defined in flo.yaml to confirm
that those tasks (and any affected downstream tasks) are re-run when
you execute flo run again.