Add yuma.json with owner and record information

domains/yuma.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+      "username": "yumatezu",
+      "email": "yumatezu@gmail.com"
+    },
+    "record": {
+        "URL": "https://github.com/yumatezu"
+    }
+}