npm init -y package.json 파일 생성
npm init -y
npm i -D webpack webpack-cli webpack-dev-server@next webpack 패키지 설치
npm i -D webpack webpack-cli webpack-dev-server@next
"scripts": { // 개발모드 "dev": "webpack-dev-server --mode development", // 제품모드 "build": "webpack --mode production" },