使用portfinder模块查找端口号

代码示例

const portfinder = require('portfinder')

portfinder.basePort = PORT

portfinder.getPort((err,) => {
    if (err) {
        console.error(err);
    }
    const url = `http://localhost:${port}/path/`;
    console.log('> Listening at ' + url + '\n');

    const app = server.listen(port, '0.0.0.0', () => {
        console.log(app.address().address);
        console.log(app.address().port);
    });
});