Get app.settings in config.rb

Hi everyone.
I use middleman 3.3.2, following the extension guide for run bash command, I need to get the path of assets.

In app.before:

app.settings.js_dir

But there is no ‘settings’ method. I already used with previous version of MM,
but I’m not familiar enough with ruby to find in source.

Excuse my basic English :slight_smile: