Add cardoso.json with domain owner and records

domains/cardoso.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "SirCalder",
+        "email": "cardosoguilherme2423@gmail.com"
+    },
+    "records": {
+        "CNAME": "github-sircalder.github.io"
+    }
+}