yarn will install all dependencies. yarn run dev will start a webpack watchman process that will create a new public/bin/bundle.js each time a file in public/scripts changes. yarn run build will manually build a new public/bin/bundle.js each time its run. Then yarn start will get the server going at localhost:3000.
The actual commands:
yarn
yarn run dev
yarn start
This project uses Facebook's Flow package. To check flow, simply use yarn run flow.