hard code focal 20.04

[wtry]

err = iso9660util.Extract(BaseDiskZip, "focal-server-cloudimg-"+fileName+".img", baseDisk) if err != nil { errs[i] = fmt.Errorf("failed to extract base image: %w", err) continue }

[balajiv113]

yes yes, the current code was to provide support for ubuntu VM.

Currently working on refactoring code using macOS 13 API's which should support more linux variations easily.