如何使用ratpack生成目录列表？

dependencies {
    // 其他依赖...
    implementation 'io.ratpack:ratpack-core:1.9.0'
}

import ratpack.server.RatpackServer;
import ratpack.server.ServerConfig;

public class Main {
    public static void main(String[] args) throws Exception {
        RatpackServer.start(server -> server
                .serverConfig(ServerConfig.embedded())
                .handlers(chain -> chain
                        .files(fileHandler -> fileHandler
                                .dir("path/to/directory") // 替换为你想要生成目录列表的目录路径
                        )
                )
        );
    }
}