Could you help me figure out please what is causing my site to hit CPU limits?

Website URL

bpen.rf.gd

Error Message

Your account was suspended because you hit the CPU limits.

Other Information

All I did was to put in a dice roller app that should in theory allow different users in different browsers to share the same session and see each other’s rolls. This is useful for playing games via email.

I don’t know why it is apparently using up server cpu resources, it should be using local cpu and only hits to save rolls to a txt file.

Where can I find logs/info to know what is actually using up these resources please?