Project: webpack
Task (moderate): I want to import markdown files directly, and get rendered html by importing them.
For example:
```js
import md from './hello.md'
```

The `md` variable is expected to be a html string rendered by its markdown content.

Implement this functionality via bundler capability.

Besides this:
- Add `import md from './hello.md'` in `src/index.js`.
- Display `md` inside a div in `src/index.js`.