Add Docker environment and web demo

[vivcheng01]

Hey @royorel ! 👋

This pull request makes it possible to run your model inside a Docker environment, which makes it easier for other people to run it. We're using an open source tool called Cog to make this process easier.

This also means we can make a web demo where other people can try out your model! View it here: https://replicate.com/royorel/style-sdf

We've added some examples to the web demo; please click the black "Claim this model" button andclaim your page here so you own it/edit it.

In case you're wondering who I am, I'm from Replicate, where we're trying to make machine learning reproducible. We got frustrated that we couldn't run all the really interesting ML work being done. So, we're going round implementing models we like. 😊