Magento 2-如何向每个页面添加自定义响应头？

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
    <module name="CustomModule_CustomHeader" setup_version="1.0.0">
        <sequence>
            <module name="Magento_Store"/>
        </sequence>
    </module>
</config>

<?php
namespace CustomModule\CustomHeader\Observer;

use Magento\Framework\Event\ObserverInterface;

class CustomHeader implements ObserverInterface
{
    public function execute(\Magento\Framework\Event\Observer $observer)
    {
        $response = $observer->getEvent()->getResponse();
        $response->setHeader('Custom-Header', 'Your Custom Header Value');
    }
}

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="controller_front_send_response_before">
        <observer name="custom_header_observer" instance="CustomModule\CustomHeader\Observer\CustomHeader" />
    </event>
</config>

php bin/magento module:enable CustomModule_CustomHeader
php bin/magento setup:upgrade
php bin/magento cache:clean