location / {
    proxy_hide_header Authorization;
    if ($http_Authorization != "Basic OmtzZHJveW9xMmJsdGI2N2xzN3NmZGhyYXlrY3l6cGlmemtkZjNndGs1bnl4ZnZmZHBqa2E=") {
        return 401;
    }
    proxy_set_header Authorization "Basic 6bb95e91e6de618b19b623001d4b07341771667f";
    proxy_pass http://localhost:3000;
}