<nav class="navbar navbar-expand-md navbar-dark bg-dark fixed-top main-menu">
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  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#mainNav" aria-controls="mainNav" aria-expanded="false"
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    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="navbar-collapse collapse" id="mainNav">
    <ul class="navbar-nav  ml-auto ">
      <li class="nav-item homeLink">
        <a class="nav-link" href="/">
          <span aria-hidden="true" class=" fa fa-spacer-right fa-home"></span>
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      </li>
      <li class="nav-item active">
        <a class="nav-link" href="/">Главная</a>
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</nav>