How to set up a Mini App for local development?

[TeeSeal]

The guide at https://docs.telegram-mini-apps.com/platform/test-environment specifies that in the test environment it is possible to use non-https mini app URLs:

For example, a developer will be allowed to create a new Telegram bot and specify a Mini Apps link with HTTP protocol or even IP

I have followed the steps described in the guide to successfully set up a test account and then used it to create a new bot via BotFather. However, when attempting to create a mini app, I am unable to specify a non-https URL (e.g. http://localhost:5137) for it as the guide suggests. BotFather still tells me that a HTTPS URL is required.

Is this behaviour expected? Am I doing something wrong?

[heyqbnk]

Try specifying an IP instead of localhost. It doesn't recognize localhost as a valid value, but shows incorrect error message

[TeeSeal]

Thank you. Using 127.0.0.1 instead of localhost works.

Side note: IPv6 values (e.g. http://[::1]:5137) don't work.