Hello,
I noticed that the version of SNAPHU on the ESA website is outdated (it is v1.4, and v2.0.4 is the newest one), so I figured out how to build it myself.
After getting to work, I decided to set up a GitHub Repository with GitHub Actions set up on it. The repository will check the SNAPHU homepage once a week, and if a new version has been released, it will automatically compile it as a Windows exe file, and upload it to the releases page.
This repository can be found here: https://github.com/Marsfan/SNAPHU-win
The process that I used to manually compile an executable can be found in the BUILDING.md file. The automatic build process is identical, but with a python script that checks the SNAPHU website for a new version, and downloads it. All of the files used in the automatic build process are documented in order to make clear how the build process works.