pdf viewer fix.

lib/ui/screens/pdf_viewer_screen.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:syncfusion_flutter_pdfviewer/pdfviewer.dart';
 import 'package:tangheem/api/tangheem_user_api_client.dart';
 import 'package:tangheem/classes/colors.dart';
+import 'package:tangheem/classes/consts.dart';
 import 'package:tangheem/classes/utils.dart';
 import 'package:tangheem/models/content_info_model.dart';
 import 'package:tangheem/ui/misc/no_data_ui.dart';
@@ -106,7 +107,7 @@ class _PdfViewerScreenState extends State<PdfViewerScreen> {
   @override
   Widget build(BuildContext context) {
     return SfPdfViewer.network(
-      widget.pdfDetail.exposeFilePath,
+      ApiConsts.baseUrl + widget.pdfDetail.exposeFilePath,
       key: _pdfViewerKey,
       canShowScrollHead: false,
       enableTextSelection: false,