Please add a "Project not found" message

[AverageCakeSlice]

I will frequently forget to change directory into my project directories from the command-line before attempting to run the SWA CLI. As it is currently, the CLI will simply state "node <path-to-server.js> exited with code 0" with no additional information.

It would be helpful if the CLI tool could display a message stating when no project could be found in the current directory before quitting. It would be a nice reminder to check the path that we're executing from instead of being frustrated at the CLI seemingly bugging out.