We do need to expose our local server to hit call-back URLs while programming with other APIs.

There is a tool called local tunnel from http://localtunnel.me/ and that does it for you for free with https. There is no need to do any changes on our router for port forwarding etc.

Now, what local tunnel is? Localtunnel allows us to easily share a web service on our local development machine without any server modifications. It will assign a unique URL which can be publicly accessible that will proxy all requests to our locally running web server.

Setup Localtunnel in your System: local tunnel- Follow these below stlocaltunnelin system

1. First, Start a webserver in any local port(example 8000)
2. Now install localtunnel by typing npm install -g localtunnel
3. After that, request a tunnel to local server by typing it in command line: lt --port 8000
4. It will generate one url that can be accessed publicly. something like https://gfgpujzxy.localtunnel.me Now, this url we can share to anyone.

As long as our local instance of this is running, anyone can access this url from internet and we can stop it when ever we want