location ^~ /<subpath> {
    # auth_basic              "Restricted";
    # auth_basic_user_file    /etc/nginx/passwd;
    proxy_pass              http://localhost:<port>/;
    proxy_connect_timeout 1;
    proxy_set_header        X-Script-Name     /<subpath>;
    proxy_set_header        Host              $http_host;
    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;
}