Where can I find Jormungandr ITN

Hi,
I want to install Shelley testnet (hopefully it’s not too late), One of the suggestion is we need to install Jormungandr right?
I found the config file for itn, but where to find the jormungandr file? or can we just use the v8.19 version?
Thanks

Where is the config file?

I found from here
https://hydra.iohk.io/build/1523436/download/1/index.html