Flask-Project-Template/src/core/templates/body-header.html

<div class="container">
    <div class="row">
        <div class="col justify-content-center text-center">
            <nav>
                <a href="#">Home</a>
                <a href="#">About</a>
                <a href="#">Donate</a>
            </nav>
        </div>
    </div>
</div>