node-fftcg/src/style/custom.scss

//
// Bootstrap and its default variables
//

@import "node_modules/bootstrap/scss/bootstrap";

body {
  margin: 0;
  background-color: #aaa;
  background-image: url(//gameranx.com/wp-content/uploads/2016/02/Final-Fantasy-XV-4K-Wallpaper.jpg);
  background-size: cover;
}