service-1.nl is not the same as www.service-1.nl. Those are distinct domains. If you’re configuring one, but requesting the other, it won’t work.
Are you sure your raspberry pi is publicly accessible on ports 80 and 443? Are you forwarding those ports to your raspberry pi?
Are you making the request from inside your network, or from outside? That often matters.
Some of your questions may be answered in this article: