Document custom domain setup

README.md

@@ -235,6 +235,22 @@ npm run build
 
 The custom production domain is [sahad.is-a.dev](https://sahad.is-a.dev/).
 
+### Custom Domain Setup (is-a.dev)
+
+*The custom domain sahad.is-a.dev was registered via the* ***is-a.dev*** *service:*
+
+1. **Claimed from** [![GitHub](https://img.shields.io/badge/GitHub-.is--a.dev-black?style=flat-square&logo=github)](https://github.com/is-a-dev)
+2. **Registered via:** [![Repository](https://img.shields.io/badge/.is--a--dev-register-0d1117?style=flat-square&labelColor=0d1117&color=8B5CF6&logo=github&logoColor=8B5CF6)](https://github.com/is-a-dev/register)
+3. **Connected to Vercel:** Added custom domain in Vercel project settings.
+4. **DNS Configuration:** *is-a.dev* automatically handles DNS routing to Vercel's edge network
+
+#### Steps Taken:
+
+- Forked/submitted domain claim to [![Register](https://img.shields.io/badge/.is--a--dev-fork-black?style=flat-square&labelColor=black&color=8B5CF6&logo=github&logoColor=0d1117)](https://github.com/is-a-dev/register/fork)
+- Added domain in **Vercel Dashboard** → Project Settings → Domains
+- Vercel provided DNS records; is-a.dev registry integrated them automatically
+- Domain now routes all traffic to Vercel deployment
+
 ## Author
 
 **Muhammad Sahad** — Frontend Developer & UI Enthusiast