app: alternative inner home path

Support binding home to an alternative path in the mount namespace.

Signed-off-by: Ophestra Umiker <cat@ophivana.moe>

main.go

@@ -188,7 +188,7 @@ func main() {
 
 		config.Confinement.AppID = aid
 		config.Confinement.Groups = groups
-		config.Confinement.Home = homeDir
+		config.Confinement.Outer = homeDir
 		config.Confinement.Username = userName
 
 		// enablements from flags