[Bug]: web-components project type does not produce a runnable build

Describe the bug

Building storybook stories for web components does not work. The stories are running only in development mode.

Repo

https://github.com/vivere-dally/sb-stencil

To Reproduce

• npm init stencil: choose components template
• npm install
• npm run build
• npx storybook init: choose web-components template
• add the following lines to ./.storybook/preview.js

import { defineCustomElements } from '../loader';

defineCustomElements();

• create a story

import type { Meta, StoryObj } from '@storybook/web-components';

const meta: Meta = {
  component: 'my-component',
};

export default meta;
type Story = StoryObj;

export const Example: Story = {
  args: {
    first: 'AAA',
    middle: 'BBB',
    last: 'CCC',
  }
}

• npm run storybook: works
• npm run build-storybook
• python3 -m http.server

The stories are not loading.

System

Storybook Environment Info:

  System:
    OS: macOS 14.2.1
    CPU: (12) arm64 Apple M3 Pro
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.9.0 - ~/.nvm/versions/node/v20.9.0/bin/node
    npm: 10.1.0 - ~/.nvm/versions/node/v20.9.0/bin/npm <----- active
  Browsers:
    Chrome: 120.0.6099.234
    Safari: 17.2.1