code: function getFilenames()
  {
    var hostname = getHostname()
      , host     = hostname.split('.')[0]
      ;
  
    return [
      'default',
      '', // allow suffixes as a basename (e.g. `environment`)
      host,
      hostname,
      'local',
      this.defaults.customIncludeFiles,
      this.defaults.customEnvVars,
      'runtime'
    ];
  }
docs: Creates list of filenames to search with
  
  @returns {array} - list of the filenames