Add Make Call Action

In the Voice controller add a new HTTP POST route. You will use this to make an outgoing call with a NCCO stream action. This action will play the audio file located at the STREAM_URL into the call.

This will place a call, and pass a single action into that call which will play the audio file located at the STREAM_URL into the call.

For testing purposes use https://raw.githubusercontent.com/nexmo-community/ncco-examples/gh-pages/assets/welcome_to_nexmo.mp3

Add the following code to the VoiceController class: