Add markcay.json for domain configuration

domains/markcay.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "markcay",
+    "email": "markgabrieller@gmail.com"
+  },
+  "records": {
+    "CNAME": "mark-cay.web.app"
+  }
+}