Hi. I will tell you the way to fix the hostname or IP not matching certificate’s altnames with Node.js.

Solution: 

You could utilize http-proxy with changeOrigin to true.

For example, I write:

const proxy = httpProxy.createProxyServer();

proxy.web(req, res, {
changeOrigin: true,
target: 'https://example.com:3000'
});

to set up a proxy so that traffic going to example.com:3000 is proxied.

Next, we design the server using:

httpProxy.createServer({
ssl: {
key: fs.readFileSync('valid-ssl-key.pem', 'utf8'),
cert: fs.readFileSync('valid-ssl-cert.pem', 'utf8')
},
target: 'https://example.com:3000',
secure: true
}).listen(443);

We use fs.readFileSync to read the key as well as certificate, and after that, we establish target to the hostname where our server is being hosted.