Bootstrap doesn't show up on Rails

I am on the Hartl tutorial and I am in chapter 5

https://www.railstutorial.org/book/filling_in_the_layout#sec-custom_css

I add bootstrap to the site but it doesn't show up for it. Instead, it appears as if I never added bootstrap at all. I added installed gem and bundle and created app / assets / stylesheets / custom.css.scss file and placed

@import "bootstrap-sprockets";
@import "bootstrap";

      

        
        
        
      

    

to the file. Then I restarted the server but nothing else appeared. If it matters I am on windows.