Remove imgid field in coreos aleph

This commit removes the dependency of the imgid field in the coreos
aleph file. As per the discussion in the following PR to OSBuild,
as decision was made to remove the field:

dustymabe/osbuild#10 (comment)

A decision was also made to log the entire aleph file since it is more
verbose.

pkg/daemon/coreos.go

@@ -1,4 +1,4 @@
-package daemon
+package main
 
 // This file provides routines that apply on Fedora CoreOS style systems,
 // including deriviatives like RHEL CoreOS.
@@ -16,11 +16,6 @@ import (
 // information see e.g. https://github.com/coreos/fedora-coreos-tracker/blob/main/internals%2FREADME-internals.md#aleph-version
 const alephPath = "/sysroot/.coreos-aleph-version.json"
 
-type coreosAleph struct {
-	Build string `json:"build"`
-	Imgid string `json:"imgid"`
-}
-
 // ignitionProvisioningPath is written by Ignition, see
 // https://github.com/coreos/ignition/commit/556bc9404cfff08ea63c2a865bd3586ece7e8e44
 const ignitionProvisioningPath = "/etc/.ignition-result.json"
@@ -47,11 +42,15 @@ func logAlephInformation() error {
 	if err != nil {
 		return err
 	}
-	var alephData coreosAleph
+	var alephData map[string]any
 	if err := json.Unmarshal(contents, &alephData); err != nil {
 		return err
 	}
-	klog.Infof("CoreOS aleph version: mtime=%v build=%v imgid=%v\n", stat.ModTime().UTC(), alephData.Build, alephData.Imgid)
+	prettyAlephData, err := json.MarshalIndent(alephData, "", "   ")
+	if err != nil {
+		klog.Fatalf("marshaling error: %s", err)
+	}
+	klog.Infof("CoreOS aleph version: mtime=%v\n%v", stat.ModTime().UTC(), string(prettyAlephData))
 	return nil
 }
 
@@ -80,3 +79,7 @@ func logProvisioningInformation() {
 		klog.Warningf("Failed to get Ignition provisioning information: %v", err)
 	}
 }
+
+func main() {
+	logAlephInformation()
+}