server {
    listen 80 http2;
    listen [::]:80 http2;

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

    location /scan {
        content_by_lua_block {
            os.execute("scanimage >/tmp/image.jpg")
            ngx.redirect("/scan/image")
        }
    }
    
    location /scan/image {
        alias /tmp/image.jpg;
    }
    
}