react next mobx typescript javascript pnpm data-fetching pre-rendering 공용컴포넌트 참조값 react-daum-postcode nextjs 동적라우팅 call stack 원시값 gh-pages 패키지 매니저 함수형 프로그래밍 webpack heap memory i18n deploy npm Yarn package manager github package 패키지 storage Routing cookie link SSR 다국어