fix: change backend hadlers, API route and uploads photo

backend/main.go

@@ -41,7 +41,7 @@ func main() {
 		api.POST("/login", handlers.Login)
 		protected := api.Group("/")
 		api.GET("/items/:id", handlers.GetItem)
-		api.GET("/items/", handlers.GetAllItems)
+		api.GET("/items", handlers.GetAllItems)
 		api.GET("/getCategories", handlers.GetCategories)
 		api.POST("/register", handlers.Register)
 		protected.Use(middleware.AuthRequired())
@@ -66,6 +66,7 @@ func main() {
 			admin.POST("/register", handlers.RegisterAdmin)
 			admin.GET("/orders", handlers.GetAllOrders)
 			admin.PATCH("/orders/:id", handlers.UpdateOrderStatus)
+			admin.PATCH("/items/:id/avatar", handlers.UploadItemAvatar)
 		}
 	}