mkdir yoppibirthday2020 cd yoppibirthday2020 npm init -y npm install --save react react-dom next mkdir pages { "name": "yoppibirthday2020", "version": "1.0.0", "description": "", "main": "index.js", "scripts": { "dev": "next", "build": "next build", "start": "next start" }, "keywords": [], "author": "", "license": "ISC", "dependencies": { "next": "^9.2.2", "react": "^16.13.0", "react-dom": "^16.13