@storybook/cli/dist/modern/frameworks/server/header.stories.json

Storybook's CLI - easiest method of adding storybook to your projects

{
  "title": "Example/Header",
  "parameters": {
    "server": { "id": "header" }
  },
  "stories": [
    {
      "name": "LoggedIn",
      "args": { "user": {} }
    },
    {
      "name": "LoggedOut"
    }
  ]
}