Adds a new blog post that covers setting up docker-mailserver on a VPS, including but not limited to
* Considerations when selecting a VPS
* Initial configuration of docker-mailserver
* DNS setup and verification of settings
* Multiple domains
Co-authored-by: Frederic Werner <20406381+wernerfred@users.noreply.github.com>
Also removed the FAQ inline heading link for Rancher. It's not a relevant link (as the question already expects knowledge of Rancher), and breaks out of the bg colour heading style due to the HTML generation logic from mkdocs.