Debian 12 Apache2 automatically redirect HTTP to HTTPS on Apache servers

 sudo a2enmod rewrite

修改 /etc/apache2/sites-available/000-default.conf
<VirtualHost *:80>
    RewriteEngine On
    RewriteCond %{HTTPS} off
    RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}
</VirtualHost>