Configuring virtual hosts in Ubuntu Apache

Create a new virtual host file as follows:
sudo cp /etc/apache2/sites-available/000-default.conf /etc/apache2/sites-available/example.com.conf

The edit it to look like below:

<VirtualHost *:80>
    ServerAdmin webmaster@localhost
    DocumentRoot /var/www/html
    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

Create another one if necessary.