code: function start(mode, target, system, containerDef, container, out, cb) {
      if (mode !== 'preview') {
        main.setup(config, mode, target, system, containerDef, container, out, cb);
      } else {
        cb();
      }
    }
docs: start the container on the target
  target - target to deploy to
  system - the target system defintinion
  cdef - the contianer definition
  container - the container as defined in the system topology
  out - ouput stream
  cb - complete callback