Starts the Rekindle file watcher and development builders without starting an HTTP server.
The optional target selection must be web, desktop, or web,desktop.
With no selection, Web is preferred when enabled; otherwise desktop is used.
mix rekindle.dev
mix rekindle.dev desktop
mix rekindle.dev web,desktopPhoenix applications normally let Rekindle.DevServer start Web development
on the first request. Run this task directly for desktop development or when
an HTTP server is not involved.