Handler returns a cli.Option that configures a cli.App as a config CLI application that is configured with flags for a configuration file and configuration JSON.

NewApp returns a new cli.App configured using Handler.

ConfigJSON is a global variable used to store the value of jsonFlag parsed from the flags for the cli.App returned by NewApp.

ConfigPath is a global variable used to store the value of configFlag parsed from the flags for the cli.App returned by NewApp.