Allow to have middleware for the path same with a HTML page

The feature was introduced with 9e2d0a7fbc,
but regressed with commit 8dc52a04e4.

runtime/src/server/middleware/get_page_handler.ts

@@ -329,14 +329,12 @@ export function get_page_handler(
 			return;
 		}
 
-		if (!server_routes.some(route => route.pattern.test(req.path))) {
 		for (const page of pages) {
 			if (page.pattern.test(req.path)) {
 				handle_page(page, req, res);
 				return;
 			}
 		}
-		}
 
 		handle_error(req, res, 404, 'Not found');
 	};