server {
    listen 80;
    listen [::]:80;

    auth_basic "";
    auth_basic_user_file /etc/nginx/htpasswd/htpasswd_scan;

    location /scan {
        content_by_lua_block {
            epoc = ngx.time();
            os.execute("scanimage --format jpeg >/srv/scans/image"..epoc..".jpg");
            ngx.redirect("/scans/image"..epoc..".jpg");
        }
    }

    location /scans {
        autoindex on;
        root /srv/;
    }

}