websevice minimize

src/app/second/second.component.ts

   }
   addItems(){
     this.htmlItems="";
-    for(let i = 1 ; i < this.items.length ; i++){
+    for(let i = 0 ; i < 20 ; i++){
       this.htmlItems += `<div class="item">
       <img src="${this.items[i].thumbnailUrl}" alt="" >
       <h6>${this.items[i].title}</h6>