added OnInit

src/app/list/list.component.ts

@@ -1,10 +1,11 @@
-import { Component } from '@angular/core';
+import {Component, OnInit} from '@angular/core';
 
 @Component({
   selector: 'app-list',
   templateUrl: './list.component.html',
   styleUrls: ['./list.component.css']
 })
-export class ListComponent {
-
+export class ListComponent implements OnInit {
+  ngOnInit(): void {
+  }
 }