board_alerts_assets.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

    <!-- Include assets used by alert boards. -->

    <template id="assets_backend" name="board_alerts assets"
        inherit_id="web.assets_backend">
        <xpath expr="." position="inside">
            <link rel="stylesheet" type="text/scss"
                href="/board_alerts/static/src/scss/alert_board.scss" />
            <script type="text/javascript" src="/board_alerts/static/src/js/alert_board.js"></script>
        </xpath>
    </template>

</odoo>