This option is for Monorepos. More specifically, monorepo system that works with a single package.json at the root of the project.
You can run every subcommand of the keycloakify CLI tool from the root of your Keycloakify project using the --project (or -p) option. Example with the build command:
npxkeycloakifybuild-p<path>
<path> would be typically something like packages/keycloak-theme
