[Suggestion] use https://tangoapp.dev as landing page

[glitch128]

Pre-issue checklist

• [X] I've searched the issue list but couldn't find the feature I want

How would you like Tango to be improved?

I think that it would be nice if https://tangoapp.dev was a landing page for Tango. It would have an available feature list, planned features, and newly added features.

How do you think it should work?

make https://tangoapp.dev not redirect you to https://app.tangoapp.dev, and make it have a link to https://app.tangoapp.dev

(Optional) Other information

No response

[yume-chan]

We now have a beautiful landing page (shown when no device is paired).