fix length control

src/app.controller.ts

@@ -55,7 +55,7 @@ export class AppController {
     if (size < 8 || size > 1000) {
       throw new BlankReturnMessageDto(400, 'Invalid size').toException();
     }
-    if (url.length > 247) {
+    if (url.length > 255 - this.urlGetPrefix.length) {
       throw new BlankReturnMessageDto(400, 'Invalid url').toException();
     }
     const buffer = await this.appService.getResizedImage(