If you're vaguely familiar with how PHP is executed and you know how to set up other hosted software, you will probably be able to understand how to set up your own board. You will probably have to follow these steps.
1. Point your domain to the server that your board is hosted on (i.e., create A and AAAA records with your DNS provider). For Google Domains, their documentation describes how to do this (https://support.google.com/a/answer/2579934?hl=en
2. Set up the web server (e.g., nginx) to which you just pointed your domain to direct requests to your CGI or FCGI software (e.g., DokuWiki).
3. Perform initial set up as necessary (e.g., adding SQL connections strings or creating an initial administrator user).