表示http客户端连接到服务器，https客户端无法连接到服务器

我已经做了一个可以正常使用http的服务器。服务器已启动，我可以使用Chrome和Postman连接到该服务器。当我将服务器切换为https时，服务器已启动，但无法使用Chrome和Postman连接到它。ssl密钥由certbot签名。

server.js

const https = require('https');
const app = require(__dirname+'/app');
const fs = require('fs');

const port = 80;
const options = {
    cert: fs.readFileSync("ssl/v2/fullchain.pem"),
    key: fs.readFileSync("ssl/v2/privkey.pem")
}

https.createServer(options, app).listen(port);
console.log(port);

app.js

const express = require('express');
const morgan = require('morgan');
const body_parser = require('body-parser');

const homepage = require(__dirname+'/routes/homepage');
const user = require(__dirname+'/routes/user');
const test = require(__dirname+'/routes/test');
const table = require(__dirname+'/routes/table');
const catalog = require(__dirname+'/routes/catalog');
const cart = require(__dirname+'/routes/cart');
const payment = require(__dirname+'/routes/payment');

const app = express();

app.use(morgan("dev"));
app.use(body_parser.json());
app.use(body_parser.urlencoded({extended: true}));

app.use("/", homepage);
app.use("/user", user);
app.use("/test", test);;
app.use("/table", table);
app.use("/catalog", catalog);
app.use("/cart", cart);
pp.use("/payment", payment);

module.exports = app;