clair: add platform-specific signals

Signed-off-by: Hank Donnay <hdonnay@redhat.com>

cmd/clair/main.go

@@ -100,7 +100,7 @@ func main() {
 	auto.PrintLogs(ctx)
 
 	// Signal handler, for orderly shutdown.
-	sig, stop := signal.NotifyContext(ctx, os.Interrupt)
+	sig, stop := signal.NotifyContext(ctx, append(platformShutdown, os.Interrupt)...)
 	defer stop()
 	zlog.Info(ctx).Msg("registered signal handler")
 	go func() {

cmd/clair/os_other.go

@@ -0,0 +1,7 @@
+//go:build !unix
+
+package main
+
+import "os"
+
+var platformShutdown = []os.Signal{}

cmd/clair/os_unix.go

@@ -0,0 +1,10 @@
+//go:build unix
+
+package main
+
+import (
+	"os"
+	"syscall"
+)
+
+var platformShutdown = []os.Signal{syscall.SIGTERM}