navbar.html

<nav class="navbar navbar-default">
    <div class="container-fluid">
      <div class="navbar-header">
        <a class="navbar-brand" href="{{ url_for('main') }}">
            <img alt="Brand" src="{{ url_for('static', filename='img/logo.png') }}" width="70" height="30">
        </a>
        <a class="navbar-brand" href="https://github.com/gonzalo-cordova-pou/interpreter">
            <h4>Code:
                <img src="{{ url_for('static', filename='img/github_logo.png') }}" width="30" height="30" alt="Github" />
            </h4>
        </a>
        <!--Bug reports-->
        <a class="navbar-brand" href="{{ url_for('report') }}">
            <h4>Report a bug:
                <img src="{{ url_for('static', filename='img/bug_logo.png') }}" width="30" height="30" alt="Bug" />
            </h4>
        </a>
        <!--How to use-->
        <a class="navbar-brand" href="https://github.com/gebakx/lp-funcions">
            <h4>How to code with Funx:
                <img src="{{ url_for('static', filename='img/question_mark.png') }}" width="30" height="30" alt="How to code" />
            </h4>
        </a>
      </div>
    </div><!-- /.container-fluid -->
</nav>