What a task! Installing and configuring Snipe-IT Asset Management on Windows Server is a pain. Below is the how to instructions video on installing snipe-it open source asset management within Windows Server 2019.
Links used during the video (Click image to enlarge)
At the end, you should have your Snipe-IT Asset Management portal up and running. I would recommend to download all the source files needed for the installation and follow the video above to get Snipe-IT installed on Windows Server 2019.