You should post on r/selfhosted ( https://www.reddit.com/r/selfhosted/ ) Been waiting for something like this for a long time ... Only thing I would change is use sqlite rather than mysql. That way your data is in a single file that is easily portable.
It's using Doctrine so the configuration should be easy to change in the .env file. Update the "DATABASE_URL" line to... `DATABASE_URL="sqlite:///%kernel.project_dir%/var/app.db"` And point it to the correct directory where your file is located.
[0] https://symfony.com/doc/current/doctrine.html#configuring-th...