How to Efficiently Implement Microservices with Nim?

[ingo]

Sorry, never used pg with Nim, only with python.

` Mummy, happyx`

Why use a (full blown) web server. When using Pub/Sub there's 'no' 
request/reply. Wouldn't [Harpoon](https://github.com/juancarlospaco/harpoon) be 
enough?