在 nginx“/”url 路径上被禁止，即使其他 url 工作正常

我使用此代码在 ec2 实例上部署了我的节点/反应/vite 应用程序

节点索引.js

if (process.env.NODE_ENV === "production") {
  app.use(express.static("frontend/build"));

  app.get("*", (req, res) => {
    res.sendFile(path.resolve(__dirname, "frontend", "build", "index.html"));
  });
}
app.listen(PORT, () => {
  console.log(`Server running ${PORT}`);
});

我在带有构建文件的 ec2 实例上运行

Nginx 配置 /etc/nginx/sites-available/default

    proxy_set_header Upgrade $http_upgrade;
     proxy_set_header Connection 'upgrade';
     proxy_set_header Host $host;
     proxy_cache_bypass $http_upgrade;

}
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/#removed for privacy#/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/#removed for privacy#/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}
server {
    if ($host = www.#removed for privacy#) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    if ($host = #removed for privacy#) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


  listen 80 default_server;
  server_name #removed for privacy# www.#removed for privacy#;
    return 404; # managed by Certbot

}