twbs/bootstrap-sass ? reverse-engineered prompt

I'd like to create a starter project using the classic Bootstrap 3, but specifically with the official Sass port. The main goal is to have a setup where I can easily customize the look and feel by editing Sass variables for colors, fonts, and spacing.

Please build a simple web project, using Node.js or a similar environment, that correctly integrates all the necessary Bootstrap Sass files. It's important that all the JavaScript components are also included and working, so things like modals, dropdowns, and carousels are functional out of the box. Make sure the Glyphicon icon fonts are properly loaded as well.

To finish, create a basic index.html page that demonstrates everything is hooked up correctly. It should display a few common components like a navbar, some buttons, and a simple grid layout to show the styling is applied and the JS is working.