A quick bootstrap for Storybook, for use alongside a Craft install.
Download these files and add to the root of an existing Craft CMS project. Probably best to start with an empty Craft install.
Run npm i to install the required files for Storybook. Then run npm run storybook to launch Storybook.
The example folder structure for template components and their corresponding *.stories.js files should be enough to get you going.
Not all twig tags are supported with the twig package thats used to load twig templates within Storybook and complex components get more difficult to emulate within Storybook. The /.storybook/preview.js file allows some customisation for twig tags, but for some reason the available "extend" and "extendTag" functionality of twig simply do not want to work in the Storybook runtime.