add product details & modify product service

src/app/product/product-detail.component.ts

@@ -0,0 +1,15 @@
+import { Component, OnInit } from '@angular/core';
+
+@Component({
+  selector: 'app-product-detail',
+  templateUrl: './product-detail.component.html',
+  styleUrls: ['./product-detail.component.css']
+})
+export class ProductDetailComponent implements OnInit {
+
+  constructor() { }
+
+  ngOnInit() {
+  }
+
+}