Add Poetry DB (#2863)

README.md

@@ -240,6 +240,7 @@ API | Description | Auth | HTTPS | CORS |
 | [LibGen](https://garbage.world/posts/libgen/) | Library Genesis search engine | No | No | Unknown |
 | [Open Library](https://openlibrary.org/developers/api) | Books, book covers and related data | No | Yes | No |
 | [Penguin Publishing](http://www.penguinrandomhouse.biz/webservices/rest/) | Books, book covers and related data | No | Yes | Yes |
+| [PoetryDB](https://github.com/thundercomb/poetrydb#readme) | Enables you to get instant data from our vast poetry collection | No | Yes | Yes |
 | [Quran](https://quran.api-docs.io/) | RESTful Quran API with multiple languages | No | Yes | Yes |
 | [Quran Cloud](https://alquran.cloud/api) | A RESTful Quran API to retrieve an Ayah, Surah, Juz or the entire Holy Quran | No | Yes | Yes |
 | [Quran-api](https://github.com/fawazahmed0/quran-api#readme) | Free Quran API Service with 90+ different languages and 400+ translations | No | Yes | Yes |