Add arunkrishna.json with domain owner details

domains/arunkrishna.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "tsundere-senpai",
+        "email": "hagemant420@gmail.com"
+    },
+    "records": {
+        "CNAME": "tsundere-senpai.github.io/portfolio/"
+    }
+}