arjion2/src/main/resources/templates/fragments/footer.html

<footer th:fragment="footer" class="col-md-12 text-center">
	<span class="col-md-12"> <a class="btn btn-primary"
		th:href="@{/}">Volver</a>
	</span><br />
	<span>&copy;2021</span>
</footer>