Signal handling

Would like to see signal processing for SIGQUIT and SIGTERM in subsequent versions for proper systemd unit operation. Currently, the systemd unit transitions to a failed state after stopping the service.
Here is a short patch for version 0.21.0:

--- main.go.orig    2023-05-24 16:14:47.781711964 +0300
+++ main.go 2023-05-24 14:09:05.000000000 +0300
@@ -181,6 +181,22 @@
    hup := make(chan os.Signal, 1)
    reloadCh = make(chan chan error)
    signal.Notify(hup, syscall.SIGHUP)
+   term_chan := make(chan os.Signal, 1)
+   signal.Notify(term_chan, syscall.SIGTERM, syscall.SIGQUIT)
+   go func(s <-chan os.Signal) {
+       for {
+           sig := <-s
+           switch sig {
+           case syscall.SIGTERM:
+               level.Info(logger).Log("msg", "Got SIGTERM. Exiting")
+               os.Exit(0)
+           case syscall.SIGQUIT:
+               level.Info(logger).Log("msg", "Got SIGQUIT. Exiting")
+               os.Exit(0)
+           }
+       }
+   }(term_chan)
+
    go func() {
        for {
            select {

Start in main.go around the signal setup near line 181 and review the provided patch in the issue. Confirm the service handles SIGTERM and SIGQUIT as intended, then verify that stopping the systemd unit no longer leaves it in a failed state.