port is not open

[kimsijin33]

I followed here git install process.
But not open 3003 port.
What is reason not open port?

I don't understand below part on the git.

Duplicate config.template in config.js and configure app host there.
config.app_host = 'www.google.es'; // Hostname to forward authenticated requests
config.app_port = '80'; // Port where the HTTP server is running

What mean above process?
Could you explain detail?

below file is already exist git clone.
config.js.template

and I made file below like a above process.
config.template

vi config.template
###################
#!/usr/bin/env node
const config = {};

// Used only if https is disabled
config.pep_port = 3003;


config.app_host = 'www.google.es'; // Hostname to forward authenticated requests
config.app_port = '80'; // Port where the HTTP server is running

module.exports = config;
###################

and I excuted below command

$npm install
$ npm start

> [email protected] start
> node ./bin/www

Referencely not remain any error log in node or npm.

Please tell me cause.
Thank you.