NewRootCmd returns the base root command.

DockerAppFormatAnnotation is the top level annotation specifying the kind of the App AppImage.

DockerAppFormatCNAB is the DockerAppFormatAnnotation value for CNAB.

DockerTypeAnnotation is the annotation that designates the type of the application.

DockerTypeApp is the value used to fill DockerTypeAnnotation when targeting a docker-app.