SUPPORT-8576 fixed file upload error

frontend/src/ts/ervu/component/fileupload/ErvuFileUpload.ts

@@ -4,7 +4,8 @@ import {
   Visible,
   Event,
   MessagesService,
-  UnsupportedOperationError
+  UnsupportedOperationError,
+  AppConfigService
 } from "@webbpm/base-package";
 import {ChangeDetectionStrategy, ChangeDetectorRef, Component, ElementRef} from "@angular/core";
 import {FileItem, FileUploader} from "ng2-file-upload";
@@ -18,6 +19,8 @@ import {EmployeeInfoFileFormType} from "./EmployeeInfoFileFormType";
              changeDetection: ChangeDetectionStrategy.OnPush
            })
 export class ErvuFileUpload extends InputControl {
+  private static readonly BACKEND_URL: string = "backend.context";
+
   @NotNull("true")
   public selectFileFieldText: string;
   @NotNull("true")
@@ -55,6 +58,7 @@ export class ErvuFileUpload extends InputControl {
   private url: string = '/backend/employee/document';
   private messagesService: MessagesService;
   private isUploadErrorOccurred = false;
+  private appConfigService: AppConfigService;
 
   constructor(el: ElementRef, cd: ChangeDetectorRef) {
     super(el, cd);
@@ -64,6 +68,8 @@ export class ErvuFileUpload extends InputControl {
   initialize() {
     super.initialize();
     this.messagesService = this.injector.get(MessagesService);
+    this.appConfigService = this.injector.get(AppConfigService);
+    this.url = `/${this.appConfigService.getParamValue(ErvuFileUpload.BACKEND_URL)}/employee/document`;
 
     this.uploader.setOptions({
       url: this.url,