求教 nginx 配置文件

用手中的 vps 跟着不良林的视频搭建了一个节点，假如现在 nginx 的配置文件是这样的

user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;

events {
    worker_connections 1024;
}

http {
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;

    include /etc/nginx/mime.types;
    default_type application/octet-stream;
    gzip on;

    server {
        listen 443 ssl;
        
        server_name nicename.co;  #你的域名
        ssl_certificate       /etc/x-ui/server.crt;  #证书位置
        ssl_certificate_key   /etc/x-ui/server.key; #私钥位置
        
        ssl_session_timeout 1d;
        ssl_session_cache shared:MozSSL:10m;
        ssl_session_tickets off;
        ssl_protocols    TLSv1.2 TLSv1.3;
        ssl_prefer_server_ciphers off;

        location / {
            proxy_pass https://bing.com; #伪装网址
            proxy_redirect off;
            proxy_ssl_server_name on;
            sub_filter_once off;
            sub_filter "bing.com" $server_name;
            proxy_set_header Host "bing.com";
            proxy_set_header Referer $http_referer;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header User-Agent $http_user_agent;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto https;
            proxy_set_header Accept-Encoding "";
            proxy_set_header Accept-Language "zh-CN";
        }


        location /ray {   #分流路径
            proxy_redirect off;
            proxy_pass http://127.0.0.1:10000; #Xray 端口
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
        
        location /xui {   #xui 路径
            proxy_redirect off;
            proxy_pass http://127.0.0.1:9999;  #xui 监听端口
            proxy_http_version 1.1;
            proxy_set_header Host $host;
        }
    }

    server {
        listen 80;
        location /.well-known/ {
               root /var/www/html;
            }
        location / {
                rewrite ^(.*)$ https://$host$1 permanent;
            }
    }
}

现在我还想安装一个 docker 项目，假如这个 docker 将占用端口6666，我将使用域名pl.help.me
那么我如何修改 nginx.conf 文件，让该域名对应 6666 端口并为该域名申请 ssl 证书
小白一枚，只会用 nginx-proxy-manager 来反向代理，一直不会使用 nginx 配置文件来反向代理，恳请各位教一下❤😢