location /proxy-yandex/ {
    sub_filter 'mc.yandex.ru'  "$host/proxy-yandex";
    sub_filter 'mc.yandex.com'  "$host/proxy-yandex";
    sub_filter_types text/plain application/javascript application/json;
    sub_filter_once off;
    rewrite ^/proxy-yandex(/.*)$ $1 break;
    proxy_set_header Host mc.yandex.ru;
    proxy_pass https://mc.yandex.ru:443;
    proxy_redirect / /proxy-yandex/;
    access_log off;
    proxy_set_header Accept-Encoding "";
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header X-Forwarded-Port $server_port;
    expires max;
}