Added rabbit.is-a.dev

Registering a new subdomain for my MERN stack portfolio. Owner: 11Rabbit11 . Will make improvements and  changes to design later.

domains/rabbit.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+      "username": "11Rabbit11",
+      "email": "rishurachit0877@gmail.com"
+  },
+  "record": {
+      "CNAME": "://vercel-dns.com"
+  }
+}