Ajout de règle pour laisser le répertoire acme accessible

<VirtualHost *:80>
        RewriteEngine on
        RewriteCond %{HTTPS} !=on [NC]
        RewriteCond %{REQUEST_URI} !^/\.well-known/acme-challenge/
        RewriteRule ^(.*)$ https://%{HTTP_HOST}/$1 [R=301,L]
        Include /etc/apache2/sites/demo.conf
</VirtualHost>

<VirtualHost *:443>
        Include /etc/apache2/sites/demo.conf

        SSLEngine on
        SSLCertificateFile /etc/ssl/certs/demo.signed.crt
        SSLCertificateKeyFile /etc/ssl/private/demo.key
        SSLCertificateChainFile /etc/ssl/certs/letsencrypt-root-intermediate.pem

</VirtualHost>