This is a barebones alternative AppImage type 2 runtime (image loader) and image maker. The image is an application and a ZIP archive (TODO: Change to zstd squashfs or another high-performace, high-compression image format).
go get github.com/probonopd/static-appimage/...
make-static-appimage APPDIR DESTINATION
APPDIR
must already contain an AppRun
.