Nuxt.js Async, Fetch

https://joshua1988.github.io/vue-camp/nuxt/data-fetching.html#%E1%84%82%E1%85%A5%E1%86%A8%E1%84%89%E1%85%B3%E1%84%90%E1%85%B3%E1%84%8B%E1%85%B4-rest-api-%E1%84%92%E1%85%A9%E1%84%8E%E1%85%AE%E1%86%AF-%E1%84%87%E1%85%A1%E1%86%BC%E1%84%89%E1%85%B5%E1%86%A8