How to use private module during hydration

[tbeseda]

I need to verify but I think each Lambda dir needs an npmrc file

[macdonst]

There is a related issue I haven't been able to find the time to work on:

https://github.com/architect/architect/issues/1061

Basically, if there is a .npmrc file in the root of an Architect project we should copy it to all the Lambdas.