apache.conf

<IfModule mod_ssl.c>
<VirtualHost *:443>
        DocumentRoot /var/www/kagamino_blog
        ServerName blog.kagamino.dev

        <IfModule mod_headers.c>
                Header always set Strict-Transport-Security "max-age=15552000; includeSubDomains"
        </IfModule>
        <Directory /var/www/kagamino_blog>
                Require all granted
                AllowOverride All
                Options FollowSymLinks MultiViews
        </Directory>

Include /etc/letsencrypt/options-ssl-apache.conf
SSLCertificateFile /etc/letsencrypt/live/blog.kagamino.dev/fullchain.pem
SSLCertificateKeyFile /etc/letsencrypt/live/blog.kagamino.dev/privkey.pem
</VirtualHost>
</IfModule>
<IfModule mod_ssl.c>
<VirtualHost *:80>
        DocumentRoot /var/www/kagamino_blog
        ServerName blog.kagamino.dev

        <IfModule mod_headers.c>
                Header always set Strict-Transport-Security "max-age=15552000; includeSubDomains"
        </IfModule>
        <Directory /var/www/kagamino_blog>
                Require all granted
                AllowOverride All
                Options FollowSymLinks MultiViews
        </Directory>
RewriteEngine on
RewriteCond %{SERVER_NAME} =blog.kagamino.dev
RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} [END,NE,R=permanent]
</VirtualHost>
</IfModule>