Consider option to use server in serverless AWS lambda

[w666]

It would be very handy to use server inside Lambda, maybe add a feature to create a SOAP server without an HTTP server and add a function that just takes raw xml payload and replies with the raw xml response, so it can be returned from lambda as is.

Background: just working on some API that will be receiving just occasional requests, it does not make much sense to spin up a container or ec2 for that.