PWA

https://qiita.com/edwardkenfox/items/4c0b9550ffa48c1f0445

http://terms.naver.com/entry.nhn?docId=3581225&cid=59088&categoryId=59096

https://qiita.com/radiocat/items/034904a094d07c389a4f

https://medium.com/@kels_orien/building-a-pwa-chat-app-with-vue-js-and-firebase-part-1-61ee3834460b