server.js

const http = require('http');
const fs = require('fs');
const path = require('path');

const PORT = 8000;

const mimeTypes = {
  '.html': 'text/html',
  '.yaml': 'text/yaml',
  '.yml': 'text/yaml',
  '.js': 'text/javascript',
  '.css': 'text/css',
  '.json': 'application/json'
};

const server = http.createServer((req, res) => {
  // Add CORS headers
  res.setHeader('Access-Control-Allow-Origin', '*');
  res.setHeader('Access-Control-Allow-Methods', 'GET, OPTIONS');
  res.setHeader('Access-Control-Allow-Headers', 'Content-Type');

  if (req.method === 'OPTIONS') {
    res.writeHead(200);
    res.end();
    return;
  }

  let filePath = '.' + req.url;
  if (filePath === './') {
    filePath = './workflow-status.html';
  }

  const extname = String(path.extname(filePath)).toLowerCase();
  const contentType = mimeTypes[extname] || 'application/octet-stream';

  fs.readFile(filePath, (error, content) => {
    if (error) {
      if (error.code === 'ENOENT') {
        res.writeHead(404, { 'Content-Type': 'text/html' });
        res.end('<h1>404 - File Not Found</h1>', 'utf-8');
      } else {
        res.writeHead(500);
        res.end(`Server Error: ${error.code}`, 'utf-8');
      }
    } else {
      res.writeHead(200, { 'Content-Type': contentType });
      res.end(content, 'utf-8');
    }
  });
});

server.listen(PORT, () => {
  console.log(`Server running at http://localhost:${PORT}/`);
  console.log(`Open http://localhost:${PORT}/workflow-status.html in your browser`);
});