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