My starter WordPress theme. Using Webpack for JS & Sass and Yarn for dependencies.
yarn
yarn watch
yarn eslint
yarn sasslint
The favicon sizes you need are in the root directory (inspired by https://github.com/audreyr/favicon-cheat-sheet), however you'll need to generate the favicon.ico in a special way. Make sure you have ImageMagick installed and then save a 16x16 PNG and 32x32 file in the same directory somewhere. Then run:
convert favicon-16.png favicon-32.png favicon.ico
Copy that outputted favicon.ico into your theme directory and you're set!