server.py

import http.server
import socketserver

PORT = 8000

class CORSRequestHandler(http.server.SimpleHTTPRequestHandler):
    def end_headers(self):
        self.send_header('Access-Control-Allow-Origin', '*')
        self.send_header('Access-Control-Allow-Methods', 'GET')
        self.send_header('Cache-Control', 'no-store, no-cache, must-revalidate')
        super().end_headers()

    def guess_type(self, path):
        if path.endswith('.js'):
            return 'application/javascript'
        return super().guess_type(path)

with socketserver.TCPServer(("", PORT), CORSRequestHandler) as httpd:
    print(f"Serving at http://localhost:{PORT}")
    httpd.serve_forever()