Quote: "is there a way to utilize PT with AppGameKit HTML exports?"
Yes it does, I just tried it. Here's an example, use space bar to send a random a score and enter key to retrieve the scores.
A word of caution though, though it's done over https, I was able to find the private key in plain text stored in the AGKPlayer.data file. So if you go this route, don't assign your private to a string variable as-is. I'd use at least some simple form of encryption and decrypt it at run time. Since the key hashes are a fixed length, I don't think it'd be too difficult to discover other people's keys in their data file either.
Quote: "does your hosting allow docker containers"