- Introduce Docker build ARG `ONNXRUNTIME_REPO`
to allow building Docker container based on a different git repo.
Example docker build command:
```bash
cd dockerfiles
docker build -t onnx-runtime \
--build-arg ONNXRUNTIME_REPO=https://github.com/jthelin/onnxruntime \
--build-arg ONNXRUNTIME_SERVER_BRANCH=my-branch \
-f Dockerfile.server .
```
- Add a basic `.dockerignore` file, to cut down the number of filles passed into the Docker build context.
