Learn from MDN

- [MDN Web Docs](https://developer.mozilla.org/en-US/) is a static documentation page
- [Yari](https://github.com/mdn/yari) is the source for the platform
- [Elasticsearch-DSL](https://elasticsearch-dsl.readthedocs.io/en/latest/) is the search engine, running separately
- [How MDN’s site-search works](https://hacks.mozilla.org/2021/03/how-mdns-site-search-works/) explains it all
