text: /* eslint-disable @typescript-eslint/no-var-requires */
  const express = require('express');
  const path = require('path');
  const app = express();
  
  app.use(express.static(path.join(__dirname, 'document')));
  app.get('/', function(req, res) {
    res.sendFile(path.join(__dirname, 'document', 'index.html'));
  });
  app.listen(3003);
  console.log('serving socket-api document: http://localhost:3003');