Feature Request: Support for AWS Lambda / API Gateway Deployment

[jason-riddle]

Is your feature request related to a problem? Please describe.
As of today, deploying an application to AWS Lambda via Waypoint requires using an AWS ALB. This is great, but can be costly depending on traffic patterns.

Describe the solution you'd like
I would like to deploy using an API Gateway as an endpoint. The API Gateway pricing seems more straight-forward to me, which makes it more attractable as an option.

Describe alternatives you've considered
Right now, only ALB is supported as an endpoint. So there is no other alternative.

Explain any additional use-cases
Mainly just quick proof of concepts. API Gateway feels like a better fit for this.

Additional context
None.

[briancain]

Hey @jason-riddle ! Thanks for the feature request. This sounds like a great idea.

Currently we have a pull request with AWS/Lambda here #3187 which will give you one option that isn't AWS ALB. Let us know if you think this will fit your use-case/feature request! Thank you.