Interface modified mmap to fd

README.md

@@ -2,7 +2,7 @@
 
 ```typescript
 // example.ts
-import { DataWriter, DataReader, jsonSerializer, createSerializer } from '@elilee/index-file';
+import { DataWriter, DataReader, jsonSerializer, createSerializer } from './index.js';
 
 // ============================================
 // 1. JSON 직렬화 (간단한 경우)
@@ -178,4 +178,4 @@ msgpackSerializer<T>()
 
 // 커스텀 바이너리
 createSerializer<T>(serialize, deserialize)
-```
+```