add local registration tip
add local registration tip

NOTE:
  pick up from https://github.com/vuejs/vuejs.org/commit/9d7aaf96e35c12537dbb050fefbd8e2ec4b7efaf

vuejs/jp.vuejs.org,potato4d/jp.vuejs.org,potato4d/jp.vuejs.org,vuejs/jp.vuejs.org