This is a bare-bones example of what to upload to Thunderstore if you want to upload your custom PizzaTowerEscapeMusic music and scripts.
Download it manually and modify it from there.
See PizzaTowerEscapeMusic's Wiki for more information on how to use scripting.
you can replace my music with that of your own. Just make sure to change the script with the name of your song. If you are using visual code its super easy to change everything with one click.