chore: add example for "wrong usage"

[TheAlexLichter]

Add an example (eg. with a CodeSandbox) that leaks a secret token so people see what they should not do 🙈

[atinux]

Or maybe explaining to switch to runtimeConfig? :)

[TheAlexLichter]

Or maybe explaining to switch to runtimeConfig? :)

I think we should deprecate that module in general and avice switching to runtimeConfig 👍🏻😋