Rename "container" to "image"

- Updated `wwctl upgrade` to handle updates
- Maintained `.Container` and `.ContainerName` in tstruct
- Added `ContainerName()` methods to node and profile objects
- Added `--container`, `-C` aliases to wwctl commands (`<node|profile> <add|set>`)
- Added `wwctl container` alias
- Added support for `container_exit.sh` if `image_exit.sh` is not found

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

internal/app/wwctl/node/set/root.go

@@ -5,7 +5,8 @@ import (
 
 	"github.com/spf13/cobra"
 	"github.com/warewulf/warewulf/internal/app/wwctl/completions"
-	"github.com/warewulf/warewulf/internal/pkg/container"
+	"github.com/warewulf/warewulf/internal/app/wwctl/flags"
+	"github.com/warewulf/warewulf/internal/pkg/image"
 	"github.com/warewulf/warewulf/internal/pkg/node"
 	"github.com/warewulf/warewulf/internal/pkg/overlay"
 )
@@ -44,12 +45,13 @@ func GetCommand() *cobra.Command {
 	vars.nodeConf.CreateFlags(baseCmd)
 	vars.nodeAdd.CreateAddFlags(baseCmd)
 	vars.nodeDel.CreateDelFlags(baseCmd)
+	flags.AddContainer(baseCmd, &(vars.nodeConf.Profile.ImageName))
 	baseCmd.PersistentFlags().BoolVarP(&vars.setNodeAll, "all", "a", false, "Set all nodes")
 	baseCmd.PersistentFlags().BoolVarP(&vars.setYes, "yes", "y", false, "Set 'yes' to all questions asked")
 	baseCmd.PersistentFlags().BoolVarP(&vars.setForce, "force", "f", false, "Force configuration (even on error)")
 	// register the command line completions
-	if err := baseCmd.RegisterFlagCompletionFunc("container", func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
-		list, _ := container.ListSources()
+	if err := baseCmd.RegisterFlagCompletionFunc("image", func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+		list, _ := image.ListSources()
 		return list, cobra.ShellCompDirectiveNoFileComp
 	}); err != nil {
 		log.Println(err)