Support Lets-Encrypt for free SSL on SelfHost / GitHost installs.
Description
Should support lets-encrypt SSL certificates by default in a self-hosted and githosted install. When configuring a custom domain in githost it would be great if it was just a toggle instead of needing to upload manually. It's free and easy to automate getting an SSL certificate, but not so easy to get a free certificate manually because they are short-term and you need access to the http server to serve static files (we don't have access as we're hosted by githost)