Add keir.json for domain configuration

domains/keir.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "keirsalterego",
+    "email": "your-real-email@gmail.com"
+  },
+  "record": {
+    "CNAME": "cname.vercel-dns.com"
+  }
+}