TypeScrip 초기설정

npx create-react-app . --template=typescript

npm install -S styled-components react-router-dom dotenv
npm install --save-dev @types/styled-components babel-plugin-styled-components @types/react-router-dom
npm install -D gh-pages
npm audit fix

# npx 대신 npm install -g (전역) 도 ok


npx create-react-app <appname> --template=typescript
cd appname
npm start