Simple watcher used by the end-user. It only checks the data files and will launch a server on the build folder. It ignores the templates and CSS files changes.
function installWatcher (startingFolder, callback) {
  bs.init({
    server: config.commands.build.output,
    port: config.commands.build.port,
    ui: false,
    open: false,
    logLevel: 'silent'
  })

  const watcher = createWatcher(path.join(startingFolder, '**/data.xml'))

  watcher.on('change', () => {
    callback()
    bs.reload()
  })
}