How to use CUPS PDF to create a network PDF printer

I’m using https://github.com/hanazuki/docker-ubuntu-cups to run cups PDF on an ubuntu docker. I mapped like this: sudo docker run -it -p 6310:631 -e ADMIN_USERNAME=admin -e CUPS_ADMIN_PASSWORD=admin -v $HOME/cups:/var/spool/cups-pdf/ANONYMOUS cups so my 6130 port is 613 inside cups. I can access the web admin panel. However, I tried adding several printer types from this list: Add Printer…

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