Add bookshop image streaming impl

bookshop/app/vue/app.js

@@ -25,7 +25,8 @@ const books = new Vue ({
 
         async inspect () {
             const book = books.book = books.list [event.currentTarget.rowIndex-1]
-            book.descr || await GET(`/Books/${book.ID}/descr/$value`) .then (({data}) => book.descr = data)
+            book.imageSrc || await GET(`/Books/${book.ID}/image`)        .then (({data}) => book.imageSrc = data )
+            book.descr    || await GET(`/Books/${book.ID}/descr/$value`) .then (({data}) => book.descr = data)
             books.order = { amount:1 }
             setTimeout (()=> $('form > input').focus(), 111)
         },

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>