The objective is to choose the main HTML file that Apache Server will display.
/etc/apache2
you must locate yourself in
/etc/apache2/sites-available
then the apache server configuration is in
default-ssl.conffind the line that says “DocumentRoot”
In my case the index.html is located in /var/www
you can write any directory you want
To apply the changes, you must restart Apache
sudo systemctl restart apache2