<VirtualHost *:80>
    ServerName www.example.net
    DocumentRoot "/var/www/html/example3"
    <Directory /var/www/html/example3>
         DirectoryIndex index.php
         AllowOverride All
         Require all granted
    </Directory>
</VirtualHost>

<VirtualHost *:80>
        ServerName example.com
        DocumentRoot /var/www/html/example-project/public
        <Directory /var/www/html/example-project/public/>
                AllowOverride All
                Require all granted
        </Directory>
</VirtualHost>

$ sudo chgrp -R www-data /var/www/html/example-project
$ sudo chmod -R 775 /var/www/html/example-project