nodejs - wrong self signed certificate in certificate chain

I'm having issues with client side https requests.

Fragments can look like this:

var fs = require('fs');
var https = require('https');

var options = {
    hostname: 'someHostName.com',
    port: 443,
    path: '/path',
    method: 'GET',
    key: fs.readFileSync('key.key'),
    cert: fs.readFileSync('certificate.crt')
}

var requestGet = https.request(options, function(res){
    console.log('resObj', res);
}

What I get is Error: Self-signed certificate in certificate chain.

When using postman, I can import the client certificate and key and use it without issue. Is there any solution available? I would also like to have an idea of ​​how Postman handles certificates and how it works.