text: const router = require('express').Router();
  const path = require ('path');
  
  router.get('/', (req, res) => {
      res.sendFile(path.join(__dirname, '../public/index.html'));
  });
  
  router.get('/exercise', (req, res) => {
      res.sendFile(path.join(__dirname, '../public/exercise.html'));
  
  });
  
  router.get('/stats', (req, res) => {
      res.sendFile(path.join(__dirname, '../public/stats.html'));
  
  });
  
  module.exports = router;