<nav class="navbar navbar-expand-md bg-dark navbar-dark">
<div class="container">
  <a class="navbar-brand" href="#">E-Pilketos</a>
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#collapsibleNavbar">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse" id="collapsibleNavbar">

  </div> 
</div>
</nav>