update cart

api/request.http

@@ -1,10 +1,14 @@
-POST http://localhost:8090/card
+POST http://localhost:8090/cart
 content-type: application/json
 
 [
   {
     "product_id": 1,
     "count": 7
+  },
+  {
+    "product_id": 20,
+    "count": 15
   }
 ]
 
@@ -20,6 +24,10 @@ content-type: application/json
     {
       "product_id": 1,
       "count": 7
+    },
+    {
+      "product_id": 20,
+      "count": 15
     }
   ]
 }