Add Tungsten web demo and API

[mjpyeon]

Hello @williamyang1991,

Thank you for sharing this awesome model!

This pull request allows building a docker container with an open-source tool called Tungstenkit.

This will also make this project uploadable to tungsten.run, a website for running ML models interactively or via API. Your model can be found here: https://tungsten.run/mjpyeon/rerender-a-video

If you want to claim ownership of the page, we'll be more than happy to transfer it.

We're making tungsten.run so that many developers, researchers, and non-technical people can enjoy state-of-the-art ML/AI. 😊