title: Rendering Issue in header.html.twig file path in page--front.html.twig
body: <p>I created a custom theme in drupal 8.</p>
  
  <p>Now after much work i want a separate file and folder for header, footer etc so created a folder partials and created a file name <code>header.html.twig</code> file copied the header from front page and now after assigning a path in that front page which is :</p>
  
  <pre><code>{% include directory ~ '/partials/header.html.twig' %}
  </code></pre>
  
  <p>I cannot get a header in the front page, if i do it directly so i can get the header on front page. </p>
  
  <p>The Code I wrote for header was :</p>
  
  <pre><code> &lt;header class="main-header" role="banner"&gt;
     &lt;div class="container"&gt;
      {{ page.header }}
      &lt;div class="main-navigation"&gt;
          {{ page.main_navigation }}
      &lt;/div&gt;
     &lt;/div&gt;
    &lt;/header&gt;
  </code></pre>