You have to know where you ‘placed’ the app files. I’m guessing it is installed in the directory /var/www/html.
Consequently this is the DocumentRoot found in the default-ssl.conf file. So by default, you can create a
<directory /var/www/htm> #this is where you will place apache directives specifice to this directory AllowOverride FileInfo Options=All </directory> within the <VirtualHost></VirtualHost>.
See Enable the Apache .htaccess File section in this link.