Install a fully functional Mautic 3 on a Raspberry Pi

There are two kinds of projects, that make the geek heart beat faster: Install Doom on any device, and run any software on a Raspberry Pi.

I was shocked to find out that there is no proper instructions on the internet for installing Mautic on a Rapsberry Pi, so I figured, this outragous neglection has to be addressed as soon as possible.