bootstrap style for proceed to checkout button

woocommerce/cart/proceed-to-checkout-button.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ * Proceed to checkout button
+ *
+ * Contains the markup for the proceed to checkout button on the cart.
+ *
+ * This template can be overridden by copying it to yourtheme/woocommerce/cart/proceed-to-checkout-button.php.
+ *
+ * HOWEVER, on occasion WooCommerce will need to update template files and you
+ * (the theme developer) will need to copy the new files to your theme to
+ * maintain compatibility. We try to do this as little as possible, but it does
+ * happen. When this occurs the version of the template file will be bumped and
+ * the readme will list any important changes.
+ *
+ * @see     https://docs.woocommerce.com/document/template-structure/
+ * @author  WooThemes
+ * @package WooCommerce/Templates
+ * @version 2.4.0
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit; // Exit if accessed directly
+}
+?>
+
+<a href="<?php echo esc_url( wc_get_checkout_url() ) ;?>" class="btn btn-primary btn-lg btn-block">
+	<?php echo __( 'Proceed to Checkout', 'woocommerce' ); ?>
+</a>