NotifyContext when running services standalone

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

services/postprocessing/cmd/postprocessing/main.go

@@ -1,14 +1,19 @@
 package main
 
 import (
+	"context"
 	"os"
+	"os/signal"
+	"syscall"
 
 	"github.com/owncloud/ocis/v2/services/postprocessing/pkg/command"
 	"github.com/owncloud/ocis/v2/services/postprocessing/pkg/config/defaults"
 )
 
 func main() {
-	if err := command.Execute(defaults.DefaultConfig()); err != nil {
+	cfg := defaults.DefaultConfig()
+	cfg.Context, _ = signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	if err := command.Execute(cfg); err != nil {
 		os.Exit(1)
 	}
 }