Add ciel.json for domain configuration

domains/ciel.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "ductai05",
+    "email": "ductai.dt05@gmail.com"
+  },
+  "records": {
+    "CNAME": "ductai05.github.io"
+  }
+}