Add gregorio.json for domain configuration

domains/gregorio.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "email": "martinogregorio2@gmail.com",
+    "username": "gregoriomartino"
+  },
+  "records": {
+    "CNAME": "gregoriomartino.github.io"
+  }
+}