respond with proper error page when the /s/:id sku fails

src/routes/frontend/itemInfo.ts

@@ -29,7 +29,9 @@ function get(req: Request, res: Response) {
 					res.send(html);
 				});
 			} else {
-				res.send('Item not found');
+				Eta.renderFile(__path + '/src/frontend/errors/404.eta.html', item).then((html) => {
+					res.status(404).send(html);
+				});
 			}
 		});
 }