Some of the options I know,
- Deliver HTML/CSS/JS directly, without a backend
- Electron builder + MacOS + Docker with Wine
- Build for Window with Docker Wine
- Deliver shadow JAR / fat JAR
- Build on Travis CI / Appveyor + GH_TOKEN (I don't know how to do this)
What are other options, if I want to use web framework, but want to avoid Electron?