部署到 Linux 后使用域名访问报错

在 Linux 上使用 Docker 部署，部署成功后使用 IP 访问正常，配置 Nginx 域名访问后报错“内核连接中断”。

Linux 版本：Ubuntu 20.04 LTS (Focal Fossa)

Nginx 配置：

server {
        server_name note.zander.fun;
        server_name_in_redirect on;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        charset utf-8;

        add_header X-Frame-Options 'SAMEORIGIN';
        add_header X-XSS-Protection '1; mode=block';
        add_header X-Content-Type-Options 'nosniff';
        add_header Strict-Transport-Security 'max-age=31536000';

        location / {
            proxy_pass http://localhost:6806;
        }

        listen 443 ssl; # managed by Certbot
        ssl_certificate /etc/letsencrypt/live/note.zander.fun/fullchain.pem; # managed by Certbot
        ssl_certificate_key /etc/letsencrypt/live/note.zander.fun/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

    }