I'm personally not a fan of containers, but that's because I like to maintain control over my deployment. You sacrifice a certain amount of control to gain a different kind of control, and so I'm more comfortable setting things up on a bare VPS.
Certainly many don't share this view, which is why NodeBB comes with a Dockerfile. I'm perfectly fine with promoting Ben Lubar's image to become the official image, as he uses our Dockerfile as far as I know.