Add domain configuration for 'everyone'

domains/everyone

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "Donsezan",
+    "email": "a4329880@gmail.com"
+  },
+  "records": {
+    "CNAME": "donsezan.github.io"
+  }
+}