resolver 127.0.0.11 valid=30s;

map $http_host $this_host {
  "" $host;
  default $http_host;
}

map $http_x_forwarded_proto $the_scheme {
  default $http_x_forwarded_proto;
  "" $scheme;
}

map $http_x_forwarded_host $the_host {
  default $http_x_forwarded_host;
  "" $host;
}

map $http_x_forwarded_port $proxy_x_forwarded_port {
  default $http_x_forwarded_port;
  '' $server_port;
}

map $http_upgrade $proxy_connection {
  default upgrade;
  "" close;
}

map $ROUTER_HOST $router_host {
    volatile;
    default onlyoffice-router;
    ~^(.*)$ $1;
}