vaultwarden/web-vault/app/views/backendLayout.html

<div class="wrapper toast-target">
    <div ui-view></div>

    <footer class="main-footer">
        <div class="pull-right hidden-xs">
            <b>Version</b> {{main.version}}
        </div>
        <strong>Copyright &copy; <span ng-bind="currentYear"></span></strong>, 8bit Solutions LLC
    </footer>
</div>