yarn add -D @types/node @types/koa-router @types/dotenv @types/koa @types/koa-logger @types/koa-session @types/koa-views @types/koa-webpack @types/koa-mount @types/webpack @types/react @types/react-router-dom @types/react-dom @types/webpack-env
yarn add -D @types/node @types/koa-router @types/dotenv @types/koa @types/koa-logger @types/koa-session @types/koa-views @types/koa-webpack @types/koa-mount @types/webpack @types/react @types/react-router-dom @types/react-dom