add cors so svelte dev server works...

serve.py

@@ -0,0 +1,11 @@
+#!/usr/bin/env python3
+from http.server import HTTPServer, SimpleHTTPRequestHandler, test
+import sys
+
+class CORSRequestHandler (SimpleHTTPRequestHandler):
+    def end_headers (self):
+        self.send_header('Access-Control-Allow-Origin', '*')
+        SimpleHTTPRequestHandler.end_headers(self)
+
+if __name__ == '__main__':
+    test(CORSRequestHandler, HTTPServer, port=int(sys.argv[1]) if len(sys.argv) > 1 else 8000)