The Slimefun plugin use GitHub Actions to the build plugin jar.
This is totally free.
Please setup Actions for Endercontainers.
https://github.com/TheBusyBiscuit/Slimefun4

I have not tested it yet, but I will try to setup it for the plugin asap :)

Install Chocolatey. Onward cmd or powershell: choco install maven; mvn package
Preliminary cut from code factions. If there are problems with compilation