server {
    listen 80 default_server;
    listen [::]:80 default_server ipv6only=on;
        root /home/znc/pisg/output;
    index index.html index.htm;
    server_name localhost;
    auth_basic "Restricted";
    auth_basic_user_file /etc/nginx/htpasswd;
    location / {
        autoindex on;
        try_files $uri $uri/ =404;
    }
    location /gfx/ {
        alias /usr/share/pisg/gfx/;
    }
}