When following the readme `docker run --rm -it -v $(pwd):/data -p 8000:80 tileserver-gl-light` the error says:
```sh
% docker run --rm -it -v $(pwd):/data -p 8000:80 tileserver-gl-light
Unable to find image 'tileserver-gl-light:latest' locally
docker: Error response from daemon: pull access denied for tileserver-gl-light, repository does not exist or may require 'docker login': denied: requested access to the resource is denied.
```
This removes the part of the documentation that is out of date.
