Connectivity monitoring

Hi folks,

I seem to be having some internet connectivity issues lately and I would like to monitor my access to the internet. I have a homelab and was wondering whether someone had perhaps something like a docker container which pings a custom website every so often and plots a timescale of when the connection was successful and when it was not.

Or perhaps you have another suggestion? I know of dashboards like grafana but I don't know whether they can be configured to actually generate that data or whether they rely on a third party to feed them. Thanks!