code: function dockerCommand(options) {
    const cmd = 'docker';
    const ps = spawnSync(cmd, options, { encoding: 'utf-8' });
    if (ps.error) {
      if (ps.error.code === 'ENOENT') {
        throw new Error('docker not found! Please install it.');
      }
      throw new Error(ps.error);
    } else if (ps.status !== 0) {
      throw new Error(ps.stderr);
    }
    return ps;
  }
docs: Helper function to run a docker command
  @param {string[]} options
  @return {Object}