15+ Moving Background Image Bootstrap PNG. I recommend you the create your own bootstrap theme, a pure css or less. Bootstrap 4 navbar concepts | bootstrap 4 tutorial.

Have you tried setting the background image of that container as the image?

Second, to keep the main form content a i'm not very experienced in bootstrap, but i think there is no such feature. Now we need to make that image to responsive based on the user screen size or viewport size. Make sure that you have jquery 3 and bootstrap 4's css and js included in your project too. Social login page with css background.