docs: def onStart(self, event):
          """
          Display the environment of a started container
          """
          c = event.container
          print '+' * 5, 'started:', c
          kv = lambda s: s.split('=', 1)
          env = {k: v for (k, v) in (kv(s) for s in c.attrs['Config']['Env'])}
          print env