I have installed my OS Class website. When performing the installation, I entered the installation URL in my address bar without www. and now my installation doesn't have a www. There doesn't seem to be a place to fix in this in General Settings. Must it be done in the database. I'm familiar with Wordpress and there's a place to change this. Is this setting somewhere else?

Check config.php, nowadays I do not see single reason to use www in url.

That fixed it. It was in the config.php file.

Glad to hear that