Update the test server to not cache anything

server.py

@@ -7,5 +7,10 @@ class CORSRequestHandler (SimpleHTTPRequestHandler):
         self.send_header('Access-Control-Allow-Origin', '*')
         SimpleHTTPRequestHandler.end_headers(self)
 
+    def send_my_headers(self):
+        self.send_header("Cache-Control", "no-cache")
+        self.send_header("Pragma", "no-cache")
+        self.send_header("Expires", "0")
+
 if __name__ == '__main__':
     test(CORSRequestHandler, HTTPServer, port=int(sys.argv[1]) if len(sys.argv) > 1 else 80)