Try fix app docker image

[WebGL3D]

What 🔨

Definitely should have tested this before committing #11. Apparently the file versioning for the package.json file uses npm link, which copies over the node_modules from the library, and then causes mass destruction.
See also: facebook/react#24928 (comment)

Fix 📦

To fix the docker image, and allow us to use the local module, we can build the module separate from app itself, and then copy over (exclusively) the distributable files into the app build image.

Unrelated 🏷️

I also removed some references that referred to this repository with the -demo suffix, since we renamed the repository to.. no longer have that suffix.

Broken 🙈

Still broken is the ability to run the app via Visual Studio code, because the npm link call breaks the app as-is.

[WebGL3D]

The current workaround for running locally in VS code:

npm uninstall @tix-factory/push-notifications
npm install @tix-factory/push-notifications

This will remove the file link, and then reinstall, downloading the module from npmjs. Of course this means local module changes won't be seen.