Socket.io Nginx-在建立连接之前关闭WebSocket

Question

我正在尝试使用websocket连接到我的Nginx服务器。

我的Nginx.conf文件是：

http {
server {
listen 8080;
server_name www.easy-emdr.com;

location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-NginX-Proxy true;

proxy_pass https://www.easy-emdr.com:8080/;
proxy_redirect off;

proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "Upgrade";
}
}
}
events{}

我的IP是占位符

我正在尝试通过（客户端）连接到它：

var socket = io.connect('https://11.11.111.11:8080', { transports: ['websocket'] });

在服务器端，我有：

server.listen(8080, () => {
    console.log('listening on 8080');
});

我得到的错误是：

WebSocket connection to 'wss://11.11.111.11:8080/socket.io/?EIO=3&transport=websocket' failed: WebSocket is closed before the connection is established.

如果您能帮助我，我将永远爱您！