Add a caveat about first loading

index.html

@@ -145,6 +145,8 @@ __      __   _  __   ____  __
 				"|                                                                             |",
 				"| " + underline + "https://leaningtech.com/webvm-virtual-machine-with-networking-via-tailscale" + normal +" |",
 				"|                                                                             |",
+				"| The first access over a local CDN endpoint might take ~30 seconds.          |",
+				"|                                                                             |",
 				"+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+",
 				"",
 				"   Welcome to WebVM. If unsure, try these examples:",