Add builtins server to example dir

Author: martindurant

example/server.py

@@ -0,0 +1,24 @@
+#! /usr/bin/env python
+import http.server
+import os
+import sys
+
+
+class ExtraHeadersHandler(http.server.SimpleHTTPRequestHandler):
+    directory = os.path.dirname(__file__) if "__file__" in locals() else os.getcwd()
+
+    def end_headers(self):
+        self.send_header("Cross-Origin-Opener-Policy", 'same-origin')
+        self.send_header("Cross-Origin-Embedder-Policy", 'require-corp')
+        self.send_header("Cross-Origin-Resource-Policy", 'cross-origin')
+        super().end_headers()
+
+
+if __name__ == '__main__':
+    port = int(sys.argv[-1]) if sys.argv[-1].isnumeric() else 9988
+    with http.server.HTTPServer(("localhost", port), ExtraHeadersHandler) as httpd:
+        print(f"Serving HTTP on 'localhost:{port}' ")
+        try:
+            httpd.serve_forever()
+        except KeyboardInterrupt:
+            print("\nKeyboard interrupt received, exiting.")