start_sf5_project_reboot/app/assets/styles/app.scss

// override bootstrap variables
@import "_variables";

// import Bootstrap 5 styles
@import "~bootstrap/scss/bootstrap";


body {
    //background-color: lightgray;
    //padding: 3em;
    div#boum {
      //background-color: white;
      padding: 1em;
      border: 1px solid grey;
   }
}