How to install and set up ngrok

First visit their official website ngrok.com

There select get started for free

THat will ask you to sign up. Just sign up

Then it will redirect you to the dashboard

Download the zip file according to your operating system

Then upzip it and there you can see a file ngrok inside the unzipped folder

Get the authtoken provided in the ngrok dashbord

./ngrok authtoken blahblahblah

To make it globally accessible move it to /usr/bi

sudo mv ngrok /usr/bin

Then open a localhost server not the port number

Then run

ngrok http <port no>