AWS Lambda is a great platform for developing IVR Applications using Voicegain Programmable IVR (RTC-API).
Below is a quick how-to that will get you running on AWS Lambda if you have not used it before.
1. Start creating Lambda function. here we choose http-request (nodejs) - we will delete most of the code is the sample so we could have also started with 'hello-world'. Obviously, you can choose any other available language, e.g. python.
2. We give function a name and choose and execution role - we select one that we previously created using AWS IAM
3. Now the the function itself is ready we need to create a trigger.
4. We choose API Gateway and then HTTP API. For simplicity and because we are just testing we leave security Open. We enable CORS to make testing easier.