[ixpmanager] Let's Encrypt

[Barry O'Donovan]

Hi Mike,

Mike Hammett wrote:
> I don't see anything obvious, but I'm by no means an expert at these
>  particular things.
>
> Any issues with setting up Let's Encrypt on my server?

It's not really related to IXP Manager but it is highly recommended. In 
fact I'd insist it's a requirement if you're going to use it in production.

Just be sure to update the APP_URL setting in .env in IXP Manager's 
install directory from http: to https:

  - Barry