node.js-端口号未隐藏在Nginx反向代理中(下一个JS服务器)

我正在尝试通过create-next-app部署next-js应用程序,我有一个像这样的自定义快递服务器-

const express = require('express')
const next = require('next')
const dev = process.env.NODE_ENV !== 'production'
const nextApp = next({ dev })
const handle = nextApp.getRequestHandler()

const fs = require('fs')

nextApp.prepare()
.then(() => {
    const server = express ()


    let port = 3000;

    let options = {
        key: fs.readFileSync('some key..','utf-8'),cert: fs.readFileSync('some cert..',};


    server.get(
        ...
    )


    let app = https.createServer(options,server)
    .listen((port),function(){
    console.log("Express server listening on port " + port);
    });

})
.catch((ex) => {
    console.error(ex.stack)
    process.exit(1)
})

当有人键入URL subdomain.maindomain.com时,我要将其部署为网站,因此我保存了两个这样的nginx配置文件-

/ etc / nginx / sites-available / default和/etc/nginx/sites-available/subdomain.maindomain.com

默认文件包含此

server {

    root /var/www/html;
    index index.html index.htm index.nginx-debian.html;

    server_name maindomain.com www.maindomain.com;

    location / {
            # try_files $uri $uri/ =404;
            proxy_pass http://localhost:3000;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            proxy_set_header Host $host;
            proxy_cache_bypass $http_upgrade;
    }

    listen [::]:443 ssl ipv6only=on; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/maindomain.com/fullchain.pem;$
    ssl_certificate_key /etc/letsencrypt/live/maindomain.com/privkey.pe$
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}

而subdomain.maindomain.com文件如下所示

server {
if ($host = www.subdomain.maindomain.com) {
    return 301 https://$host$request_uri;
} # managed by Certbot


if ($host = subdomain.maindomain.com) {
    return 301 https://$host$request_uri;
} # managed by Certbot


    listen 80;
    listen [::]:80;

    root /var/www/subdomain.maindomain.com/somecodefolder/;
    index index.html index.htm index.nginx-debian.html;

    server_name subdomain.maindomain.com www.subdomain.maindomain.com;


    location / {

        proxy_pass http://localhost:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
       # try_files $uri $uri/ =404;
    }

}

如果输入https://subdomain.maindomain.com:3000,一切正常,我看到我的网站正在运行.但是,当我键入https://subdomain.maindomain.com(无端口号)时,它什么也没有显示.当我只输入网址而不输入端口号时,如何获取所需的内容.我尝试了许多组合,但无法做到.有人请帮助我自2天以来一直在尝试.