add Dockefile to run in a container

[jakob1379]

adding a Dockerfile allows for building a and pushing dockerimages which makes spinning up the viewer easier.

Build with

docker build -t online3dviewer:local .

and run with

docker run --rm -p 8080:8080 online3dviewer:local

[jakob1379]

I know documentation is not added, but I am unsure where you would like it to go.

It would be nice to be able to add docker run --rm -p 8080:8080 online3dviewer:latest if it was hosted on something like dockerhub or just on github