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/image/copy/main.go

@@ -0,0 +1,50 @@
+package copy
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"github.com/warewulf/warewulf/internal/pkg/api/routes/wwapiv1"
+	"github.com/warewulf/warewulf/internal/pkg/image"
+	"github.com/warewulf/warewulf/internal/pkg/wwlog"
+)
+
+func CobraRunE(cmd *cobra.Command, args []string) (err error) {
+
+	if len(args) > 2 {
+		wwlog.Warn("copy only requires 2 arguments but you provided %d arguments. Hence, they will be ignored.", len(args))
+	}
+
+	cdp := &wwapiv1.ImageCopyParameter{
+		ImageSource:      args[0],
+		ImageDestination: args[1],
+		Build:            Build,
+	}
+
+	if !image.DoesSourceExist(cdp.ImageSource) {
+		return fmt.Errorf("image's source doesn't exists: %s", cdp.ImageSource)
+	}
+
+	if !image.ValidName(cdp.ImageDestination) {
+		return fmt.Errorf("image name contains illegal characters : %s", cdp.ImageDestination)
+	}
+
+	if image.DoesSourceExist(cdp.ImageDestination) {
+		return fmt.Errorf("an other image with name: %s already exists in sources", cdp.ImageDestination)
+	}
+
+	err = image.Duplicate(cdp.ImageSource, cdp.ImageDestination)
+	if err != nil {
+		return fmt.Errorf("could not duplicate image: %s", err.Error())
+	}
+
+	if cdp.Build {
+		err = image.Build(cdp.ImageDestination, true)
+		if err != nil {
+			return err
+		}
+	}
+
+	wwlog.Info("Image %s successfully duplicated as %s", cdp.ImageSource, cdp.ImageDestination)
+	return
+}