message: Don't use JSON.stringify in the default logger.js hook
diff: // See https://github.com/winstonjs/winston for documentation
  // about the logger.
  const logger = require('winston');
  +const util = require('util');
  // To see more detailed messages, uncomment the following line:
  // logger.level = 'debug';
  @@ -12,8 +13,8 @@ module.exports = function () {
  // You can customize the message (and logger) to your needs
  logger.debug(`${context.type} app.service('${context.path}').${context.method}()`);
  - if(typeof context.toJSON === 'function') {
  - logger.debug('Hook Context', JSON.stringify(context, null, ' '));
  + if(typeof context.toJSON === 'function' && logger.level === 'debug') {
  + logger.debug('Hook Context', util.inspect(context, {colors: false}));
  }
  if (context.error) {
  