nginx打开目录浏览功能失败

Question

第一次用nginx，安装了h5ai，权限也改了，能正常显示界面但是看不到目录，也按照作者的要求设置了，nginx.conf如下：

http {
    include  mime.types;
    default_type  application/octet-stream;

    sendfile  on;
    keepalive_timeout  65;

    index  index.html  index.php  /docs/_h5ai/public/index.php;

    server {
        listen  80;
        server_name  local;
        root  /home/wwwroot/docs;

        location / {
            autoindex  on;
        }

        location ~ \.php$ {
            include  fastcgi.conf;
            fastcgi_index  index.php;
            fastcgi_pass  unix:/tmp/php-cgi.socket;
        }
    }
}