feat: add rokartur.is-a.dev domain

domains/rokartur.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "rokartur",
+        "email": "rokartur@icloud.com"
+    },
+    "records": {
+        "CNAME": "https://github.com/rokartur"
+    }
+}