PS: Please consider donating something, anything to the guy - he really keeps delivering and has done a lot for Synology users, helping everyone get started with all things Docker!
This is really cool, I kind of always wondered how to host stuff which is not on their app store, now I see, there is even a reverse proxy build in and so on.
If your model is Docker-capable, there's a whole new, exciting world waiting! :-) And the site I linked to is a very good starting point for that journey, because it has many, many easy to follow tutorials.