Configure nodes.conf path dynamically from config

Removes the use of init() to initialize the variable.

- Closes: #1596
- See also: #1569

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

internal/app/wwctl/container/copy/root.go

@@ -26,7 +26,6 @@ var (
 )
 
 func init() {
-	// Nothing to do here
 	baseCmd.PersistentFlags().BoolVarP(&Build, "build", "b", false, "Build container after copy")
 }