Installation

Update and upgrade the system:

sudo apt update && sudo apt upgrade -y

Install the Apache software:

sudo apt install apache2

Allow Apache in the firewall:

sudo ufw app list

sudo ufw allow Apache

Virtual host

Create a dedicated directory for the virtual host:

sudo mkdir -p /www

sudo mkdir -p /www/grav.howto.ovh

sudo chmod -R 755 /www

Edit a new file with nano:

sudo nano /etc/apache2/sites-available/grav.howto.ovh.conf

And paste these lines:

<VirtualHost *:80>
    ServerName grav.howto.ovh
    DocumentRoot /www/grav.howto.ovh
    <Directory /www/grav.howto.ovh>
        Options Indexes FollowSymLinks
        AllowOverride All
        Require all granted
    </Directory>
    ErrorLog ${APACHE_LOG_DIR}/grav-howto-ovh.error.log
    CustomLog ${APACHE_LOG_DIR}/grav-howto-ovh.access.log combined
</VirtualHost>

Save and exit nano.
Enable the virtual host an disable the default Apache website:

sudo a2ensite grav.howto.ovh.conf

sudo a2dissite 000-default.conf

Enable two additional modules required by Grav:

sudo a2enmod rewrite ssl

Restart apache2 service:

sudo systemctl restart apache2