code: function loadJSConfigFile(filePath) {
      debug(`Loading JS config file: ${filePath}`);
      try {
          return importFresh(filePath);
      } catch (e) {
          debug(`Error reading JavaScript file: ${filePath}`);
          e.message = `Cannot read config file: ${filePath}\nError: ${e.message}`;
          throw e;
      }
  }
docs: Loads a JavaScript configuration from a file.
  @param {string} filePath The filename to load.
  @returns {Object} The configuration object from the file.
  @throws {Error} If the file cannot be read.
  @private