The following is the answer I found on Baidu:

1. Directory listing

nginx only requires one command to display the files in the directory in the form of a list

autoindex on;

autoindex can be placed in location and will only work on the directory of the current location. You can also put it in the server directive block and it will apply to the entire site. Or put it in the http command block, it will take effect on all sites.

Here is a simple example:

server {
        listen   80;
        server_name  domain.com www.domain.com;
        access_log  /var/...........................;
        root   /path/to/root;
        location / {
                index  index.php index.html index.htm;
        }
        location /somedir {
               autoindex on;
        }
}

2.nginx prohibits access to a certain directory

Similar to Apache’s Deny from all, nginx has the deny all instruction to implement it.

To disable access to the dirdeny directory and return 403 Forbidden, you can use the following configuration:

location /dirdeny {
      deny all;
      return 403;
}