If you do not have parceljs installed run:
Yarn:
yarn global add parcel-bundler
or
npm: npm install -g parcel-bundler
Install dependencies:
Yarn: yarn
or
npm: npm install
And you're ready to start messing with react:
yarn: yarn start
or
npm: npm run start
Note: Also has the object spread plugin since thats been pretty widely adopted but isn't included the latest babel presets.