Add phongdk.json for domain configuration

domains/phongdk.json

@@ -0,0 +1,10 @@
+{
+    "owner": {
+        "username": "kpdo2910",
+        "email": "s2kimphongs2@gmail.com",
+        "phone": "(+84) 941067198"
+    },
+    "records": {
+        "CNAME": "kpdo2910.github.io"
+    }
+}