Overview of the Feature

Provide a way to disable SSL verification on GitHub Enterprise Server (from Lambda interactions).

Reproduce the Error

When GitHub Enterprise Server is deployed (on premise) with a "custom" certificate, the scale-up Lambda hasn't this certification chains and fails with:

request to https://github.staging.company.com/api/v3/app/installations/xx/access_tokens failed, reason: unable to verify the first certificate

Motivation for or Use Case

In some case, GHES could be deployed with a custom certification chains, because a wildcard DigiCert/VeriSign could be too much (sample: for non-production platform).

Suggest a Fix

A (simple) way could be to disable SSL verification at NodeJs level, by providing NODE_TLS_REJECT_UNAUTHORIZED environment variable:

NODE_TLS_REJECT_UNAUTHORIZED=0 

Pull-Request will come with this suggestion.