restructure

container/container.go

@@ -8,9 +8,14 @@ import (
 )
 
 var Container *dig.Container = dig.New()
+var Cancel context.CancelFunc
 
 func init() {
-	if err := Container.Provide(context.Background); err != nil {
+	if err := Container.Provide(func() context.Context {
+		ctx, cancel := context.WithCancel(context.Background())
+		Cancel = cancel
+		return ctx
+	}); err != nil {
 		log.Fatal(err)
 	}
 }