code: function _defaults (config) {
    let values = require('./defaults/default')
  
    try {
      values = merge(values, require(`./defaults/${process.env.NODE_ENV}`))
    } catch (e) { }
  
    return defaultsDeep(config, values)
  }
docs: Set default values for the `config` param if not set
  
  @private
  @param {Object} [config] - The config to use (optional)
  @returns {Object} - The config object with default values