[ENHANCEMENTS] - Monitoring statistics persists when container restarts

[dnielso5]

Is your feature request related to a problem? Please describe.
My server has a nightly backup which restarts Portainer, when Portainer turns back on the monitoring statistics start over.

Describe the solution you'd like
statistics do not restart

[tobychui]

This sounds like a docker issue to me.

The signals SIGKILL and SIGSTOP may not be caught by a program
https://pkg.go.dev/os/signal

We use signal package to catch the shutdown signal for Zoraxy. If you are sending the interrupt signal into Zoraxy correctly, it should be able to save the statistic data to file.

@PassiveLemon would you mind to take a look at this? Or if you need a new API (to save statistic from docker or some external event?) please feel free to let me know :)

[PassiveLemon]

Sounds like #133 again, this probably is happening again because I'm starting Zoraxy through the entrypoint script... will look into this

[tobychui]

Should be fixed with the PR mentioned above. Closing this now.