it's a good post, however I agree with the comments there and here that a raspberry pi 5 with 8gb ram is an overkill for just running pihole. a good old Raspberry Pi 3 Model B with 1gb ram it's enough and it will still have capacity to run other things there. And of course pihole can run on an old laptop or desktop box you already have so no need to buy a device just for the sake of it. I would rather not run it as a docker container thou but that's just my preference