Added assets folder and an empty posts.json file.

package.json

@@ -11,6 +11,7 @@
     "e2e": "ng e2e"
   },
   "private": true,
+  "assets": ["assets", "favicon.ico"],
   "dependencies": {
     "@angular/animations": "^4.0.0",
     "@angular/common": "^4.0.0",

src/app/app.component.html

@@ -16,5 +16,5 @@
 
   <!--this shows the current route's content-->
   <router-outlet></router-outlet> 
-  
+
 </div>

src/assets/posts.json

@@ -0,0 +1,6 @@
+[
+    {
+        "title":"First post",
+        "id":1
+    }
+]