Building an image from github, how hard can it be?!

Hi guys! I have been struggling the whole day, so now I need to reach out to you.
I want to use this version of Radarr but I can’t for the love of god make it right. There are two options, one for Docker, but as I understand also one that can be created for Windows. How do I build an installable software of this?

Why not just Install Docker Desktop on Windows | Docker Documentation