{ "engines": { "node": "10.15.3", "yarn": "1.15.2" }, "scripts": { "build": "yarn --cwd client install && yarn --cwd client build", "deploy": "cp -a client/build/. protected_public/", "heroku-postbuild": "yarn build && yarn deploy" }, "dependencies": { "react-router-dom": "^5.0.1" } }