websocket不支持ssl连接吗？ about onebot-kotlin HOT 6 CLOSED

upstream backend{
    server localhost:8080;	      
}
server
{
    server_name subdomain.tld;
    charset UTF-8;
    access_log      /var/log/nginx/uWSGI_access.log;
    error_log       /var/log/nginx/uWSGI_error.log;
	      
    client_max_body_size 75M;
    location / { 
	proxy_pass http://backend;
        proxy_redirect off;
        proxy_http_version 1.1;
        proxy_buffering off;
        proxy_connect_timeout 30s; 
        proxy_read_timeout 600s; 
        proxy_send_timeout 30s; 
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }   
    location /static {
        expires 30d;
        autoindex on; 
        add_header Cache-Control private;
        alias /home/ubuntu/project/static;
    }


    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/subdomain.tld/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/subdomain.tld/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 ($host = subdomain.tld) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    server_name subdomain.tld;
    listen 80;
    return 404; # managed by Certbot
}