nginx allowed country

https://devcoops.com/block-visitors-by-country-in-nginx/

https://mailfud.org/geoip-legacy/

https://ru.stackoverflow.com/questions/1378257/%D0%9A%D0%B0%D0%BA-%D0%BF%D0%BE%D0%B4%D0%BA%D0%BB%D1%8E%D1%87%D0%B8%D1%82%D1%8C-geoip-%D0%BC%D0%BE%D0%B4%D1%83%D0%BB%D1%8C-%D0%B2-docker-%D0%BA%D0%BE%D0%BD%D1%82%D0%B5%D0%B9%D0%BD%D0%B5%D1%80%D0%B5-nginx

http {
    ...
    geoip_country /usr/share/GeoIP/GeoIP.dat;
    map $geoip_country_code $allowed_country {
        default no;
        US yes;
   }
}


server {
    ...
    if $(allowed_country = no) {
        return 403;
    } 
}