tools/serve.py

import http.server, socketserver

class CORSRequestHandler(http.server.SimpleHTTPRequestHandler):
    def end_headers(self):
        self.send_header('Access-Control-Allow-Origin', '*')
        super().end_headers()

# This matches the port Label Studio is looking for in your screenshot
PORT = 8081
with socketserver.TCPServer(("", PORT), CORSRequestHandler) as httpd:
    print(f"🚀 Image server active at http://localhost:{PORT}")
    httpd.serve_forever()