编写一段代码，内容是nginx代理两台prometheus做负载均衡加权轮询，要求做tls加密，并进行nginx自身优化

以下是使用 Nginx 做为代理，对两台 Prometheus 做负载均衡加权轮询，并进行 TLS 加密的 Nginx 配置代码：

# 加载 Nginx 的 SSL 模块
load_module modules/ngx_stream_ssl_module.so;

stream {
    # 启用 SSL
    ssl_certificate /path/to/cert.pem;
    ssl_certificate_key /path/to/cert.key;
    ssl_protocols TLSv1.2;
    ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA;
    ssl_prefer_server_ciphers on;

    # 配置两台 Prometheus 服务器
    upstream prometheus {
        server prometheus1:9090 weight=1;
        server prometheus2:9090 weight=2;
    }

    # 定义代理规则
    server {
        listen 9091;

        proxy_pass prometheus;
        proxy_next_upstream error timeout;
        proxy_connect_timeout 1s;
        proxy_timeout 3s;

        # 启用 Nginx 的 gzip 压缩
        gzip on;
        gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
        gzip_min_length 256;
    }
}

注意：