My site www.site.com loads apache2 'It works' page instead of the expected home page of moode which is located at /var/www/html/moodle. There is an index file index.php inside moodle directory but it is not taken by default. If I go to www.site.com/moodle the site homepage comes. The configuration file /etc/apache2/sites-available/site.conf is enabled. How to solve this?

<VirtualHost *:80>
    ServerName www.site.com
    ServerAlias site.com
    ServerAdmin webmaster@localhost
    DocumentRoot /var/www/html/moodle
    DirectoryIndex index.php
    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
    RewriteEngine on
    RewriteCond %{SERVER_NAME} =www.site.com
    RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} 
    [END,NE,R=permanent]
</VirtualHost>