add target to kompose build

Signed-off-by: jose luis <2064537+sosan@users.noreply.github.com>

pkg/loader/compose/compose.go

@@ -559,6 +559,7 @@ func dockerComposeToKomposeMapping(composeObject *types.Project) (kobject.Kompos
 			serviceConfig.Dockerfile = composeServiceConfig.Build.Dockerfile
 			serviceConfig.BuildArgs = composeServiceConfig.Build.Args
 			serviceConfig.BuildLabels = composeServiceConfig.Build.Labels
+			serviceConfig.BuildTarget = composeServiceConfig.Build.Target
 		}
 
 		// env