Install npm if it is not already installed:
brew install node
git clone https://github.com/cpetrosi/signalwire-ivr.git
cd signalwire-ivr
npm install
Download ngrok from:
https://ngrok.com/download
In terminal, navigate to the directory where ngrok is installed and run:
./ngrok http 3000
In a new terminal window, run:
node index.js