vbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="navbarNavAltMarkup">
          <div class="navbar-nav">
            <a href="index.html" class="pl-md-0 p-3 text-white">Start</a>
            <a href="app.html" class="p-3 text-decoration-none text-white">App example</a>
            <a href="form.html" class="p-3 text-decoration-none text-white">Form example</a>
          </div>
        </div>
      </nav>

    </div>
  </div>


  

<div class="jumbotron bg-primar