func startInBackground(a provision.App, c container, imageId string, w io.Writer, started chan bool) {
_, err := start(a, imageId, w)
if err != nil {
log.Errorf("error on start the app %s - %s", a.GetName(), err)
started <- false
return
}
if c.ID != "" {
if a.RemoveUnit(c.ID) != nil {
removeContainer(&c)
}
}
started <- true
}