The public/index.html file contains a <script src='bundle.js'> tag, which means we need to create public/bundle.js.
The rollup.config.js file tells Rollup how to create this bundle, starting with src/app.js and including all its dependencies.
Current tree structure:
src
├── app.js
├── color.js
├── data
│ └── mtn94.json
├── footer.js
├── palette.js
├── search-result.js
├── search.js
└── utils.js
npm run build builds the application to public/bundle.js, along with a sourcemap file for debugging.
npm start launches a server, using serve. Navigate to localhost:5000.
npm run watch will continually rebuild the application as your source files change.
npm run dev will run npm start and npm run watch in parallel.