Adding custom DNS alert or information

[kehiy]

Is there an existing issue that is already proposing this?

• I have searched the existing issues

🪄 describe your feature or idea

That's good to add an info box or textbox in the add custom server page with some text like this:

DNS servers can answer queries as expected and return danger responses.
So, make sure your custom server is trusted, safe, and secure.

Adding some links about it in the info box is a good thing too.

💻 In which operating systems have you tested?

• Linux
• macOS
• Windows