router added career history

frontend/angular/src/app/components/my-career-web/career-history/career-history/career-history.component.ts

 import { Component, OnInit } from '@angular/core';
 import { BaseComponent } from '../../base/base.component';
+import { Router } from '@angular/router';
 
 @Component({
     selector: 'app-career-history',
@@ -8,7 +9,9 @@ import { BaseComponent } from '../../base/base.component';
 })
 export class CareerHistoryComponent extends BaseComponent implements OnInit {
 
-    constructor() {
+    constructor(
+        private r: Router
+    ) {
         super();
     }