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.
https://purpletoken.com/agk/thingy.html
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"
I doubt it. There's nothing in the cpanel about it. I could ask them and they might be able to if the systems are setup that way, but then again I asked them if I could get tomcat installed so I could do some JSP stuff and they replied with "can't you just use node.js"..... I have little faith in tech support that doesn't know the difference between java and javascript. But I do have the ability now to manually select which version of php to use. I was on 5.6. But it appears 7.2 is already deprecated though I had issues with getting sessions to work properly using 8. I've abandoned mysqli in favor of PDO, I think it'll be more future proof.