// {app_root}/config/plugin.js
exports.freemarker = {
  enable: true,
  package: 'egg-view-freemarker.js',
};

// {app_root}/config/config.default.js
// config/config.default.js
module.exports = appInfo => {
  const config = exports = {};
  
  // ....  Your config
  
  // egg-view-freemarker.js config
  config.view = {
    root: path.join(appInfo.baseDir, './app/view/freemarker'),
    mapping: {
      '.htm': 'freemarker',
    },
    defaultViewEngine: 'freemarker',
  };
  
  return config;
};