Update README.md

Author: mojavad

README.md

@@ -7,3 +7,20 @@ An opinionated SDK to get up and running with Cloudflare Workers:
 - Just write **Simple Functions**, without requiring any manual calling and configuring of `fetch` requests. 🏃
 - Virtually **no boilerplate** - simply instantiate a client and get started. 🚀
 
+---
+
+## Setup
+
+Using your preferred package manager, install the `worker-functions` package. For example: 
+
+```
+yarn add worker-functions
+```
+
+After the installation is complete, run: 
+
+```
+npx worker-functions
+```
+
+This will generate a `wrangler.json` configuration file in your project root directory.