MacOS uses LibreSSL by default instead of openssl

[bartversluijs]

Hi,

The quickstart script fails on macs because LibreSSL is used by default (or at least it's on my mac).
To solve this, I've to add a little part to the PATH environment variable, which can be done by one of these commands:

$ export PATH="/usr/local/opt/openssl/bin:$PATH"
$ PATH="/usr/local/opt/openssl/bin:$PATH" ./scripts/quickstart

I wanted to create a PR for this, however, there are many scripts executed in the quickstart, so I don't really know where to start without creating spaghetti code. Still happy to create a PR though once I get pointed into the right direction 🙂

Any thoughts?