css/modules/primer-progress/stories.js

import React from "react";
import { storiesOf } from "@storybook/react";
import storiesFromMarkdown from "../../.storybook/lib/storiesFromMarkdown";

const stories = storiesOf("Progress", module);

storiesFromMarkdown(require.context(".", true, /\.md$/)).forEach(
  ({ title, story }) => {
    stories.add(title, story);
  }
);