add link to forking discussion

README.md

@@ -4,8 +4,14 @@
 
 ULID generator library for [Cloudflare Workers](https://developers.cloudflare.com/workers/), based off of the fork [ulidx](https://github.com/perry-mitchell/ulidx) which in turn was based on the original [ulid](https://github.com/ulid/javascript) for NodeJS and the browser.
 
+**What is a ULID**
+
 ULIDs are Universally Unique Lexicographically Sortable Identifiers. This library adheres to [this specification](https://github.com/ulid/spec).
 
+**Why fork `ulidx`?** 
+
+See [this dissussion](https://github.com/perry-mitchell/ulidx/pull/6#issuecomment-1003190116). 
+
 ## Installation
 
 Install using npm by running: `npm install ulid-workers --save`.