message: fixup image name
diff: @@ -40,10 +40,10 @@ Put these 3 files in the `container_files/nvidia/files` directory.
  Run `docker build` from the `container_files/nvidia` directory as follows, changing `TAG` for something useful:
  ```
  -docker build -t mldb_base_nvidia:TAG -f ./Dockerfile .
  +docker build -t quay.io/datacratic/mldb_base_nvidia:TAG -f ./Dockerfile .
  # To reduce the image size we can squash (flatten, merge) the docker image
  -virtualenv/bin/docker-squash -t mldb_base_nvidia:TAG.squashed mldb_base_nvidia:TAG
  +virtualenv/bin/docker-squash -t quay.io/datacratic/mldb_base_nvidia:TAG.squashed quay.io/datacratic/mldb_base_nvidia:TAG
  ```
  