Add bookshop image streaming impl

bookshop/app/vue/index.html

@@ -37,6 +37,10 @@
         </tr>
     </table>
 
+    <div v-if="book.title">
+        <img v-bind:src="book.imageSrc" alt=""/>
+    </div>
+
     <div v-if="book.title">
         <label style="text-align:right">
             <span class="is-success"> {{ order.succeeded }} </span>