That's because the official f-droid repo is very slow on getting new releases, so they created their own repo so that they can release as fast as they have a new build.
I don't really like using Docker so I always go for easier option
Usually docker is the easiest option as you don't have to install a lot of dependencies, then set up other services and databases and whatnot. Especially if you use docker-compose.
Have you ever bought something online (movies, games) that you can't save/download and then the company you have the money to removed that? That is stealing from you. Simple.
Depending on how the UEFI is configured, a simple copy/paste command, executed either by the malicious image or with physical access, is in many cases all that’s required to place the malicious image into what’s known as the ESP, short for EFI System Partition, a region of the hard drive that stores boot loaders, kernel images, and any device drivers, system utilities, or other data files needed before the main OS loads.
Who cares?