fix: 上传文件后客户端无法获取到的bug

Server.mts

@@ -17,10 +17,6 @@ import koaMount from 'koa-mount';
 import ConfigHelper from './ConfigHelper.mjs';
 import DBHelper from './DBHelper.mjs';
 
-
-const __dirname = dirname(fileURLToPath(
-    import.meta.url));
-
 ConfigHelper.initConfig();
 
 (async () => await DBHelper.init())();
@@ -33,6 +29,9 @@ export default CreateServer
  * port: 服务端口号
  */
 function CreateServer(port = 4873) {
+    const __dirname = dirname(fileURLToPath(
+        import.meta.url));
+
     const router = new getRouter();
     const app = new Koa();
     app.use(koaBody());