Graceful restart or stop

[mattmurphy-github]

I would recommend checking for context.DeadlineExceeded instead of "catching" <-ctx.Done() in a select.

For example;

ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
err := srv.Shutdown(ctx)
if errors.Is(err, context.DeadlineExceeded) {
log.Println("Timeout of 5 seconds.")
}