Add karxn.json with owner and record details

domains/karxn.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "karangandhi-1712",
+        "email": "karananandgandhi@gmail.com"
+    },
+    "record": {
+        "CNAME": "karangandhi-1712.github.io"
+    }
+}