sim3x

server {
  listen 80, 443;
  server_name domain1.local, www.domain1.local;
  rewrite https://domain2.local permanent;
}

server {
  listen 80;  # для понимания
  server_name domain2.local, www.domain2.local;
  rewrite https://domain2.local permanent;
}

server {
  listen 443;
  server_name domain2.local;
....
}

http {
    default_type    text/html;

# choose the language that appears first in the accept_language header
    if ($http_accept_language ~* "(fr|ru)") {
        set $lang $1;
    }

    location ~ ^/$ {
        rewrite ^ $lang/ redirect;
    }

location /admin {
    auth_basic           "closed site";
    auth_basic_user_file conf/htpasswd;
}

NetRange: 172.16.0.0 - 172.31.255.255
CIDR: 172.16.0.0/12
NetName: PRIVATE-ADDRESS-BBLK-RFC1918-IANA-RESERVED

log_format  main  '$remote_addr|$time_local]|$request|$request_time|$upstream_response_time|'
                  '$status|$body_bytes_sent|$http_referer|'
                  '$http_user_agent';

I include the --profiler option too

--profiler pycall

--profiler pyline

they will write function timings in the logs. You can analize logs to find
bottleneck (not an easy task, but it should be doable investing a bit of
time in log parser)

server {
        server_name  domain.com;
        location ~* /(\da-z)+/(.*) {
             return 302 http://$1.domain.com/$2;
        }
# тут нужно обработать остальное
    }

    server {
        listen 8080;
        server_name *.domain.com;
# основная часть конфига
}