Move to PDO for greater compatibility and easier adoption. (correct me if im wrong, but I think the code isn't using anything sqli specific. So just the connection needs to be changed or the structure of the whole db interaction needs to be changed.)
files that need to be looked at: inc/databaseConn.php
Update Node dependencies
Clean up legacy code and structure
Generalize code so it's applicable elsewhere or document it so other devs can accommodate their own campuses.