$ yarn install
$ yarn start

Then visit http://localhost:3000.

Production has Devtools, logging and hot reloading middleware removed and the scripts/css compressed.

$ yarn run build
$ yarn run start-prod

Prerequisite:

heroku labs:enable runtime-dyno-metadata

Then visit http://localhost:3000.

$ yarn lint --fix && yarn test --coverage

Some code taken from the following (all MIT licensed):

• react-hexgrid
• notsurt's spritegen
• gimenete's identicons-react