* Update getting-started-docker.md to remind the user to use the --host flag
Currently this part of the docs doesn't remind the user to use the --host flag. If the user doesn't use it, then the website will not be accessible outside of the docker container. This is what the user ultimately wants, to avoid using node and ruby and develop/productivize his website in a container.
* Upper case correction
Co-authored-by: Sébastien Lorber <slorber@users.noreply.github.com>
Co-authored-by: Sébastien Lorber <slorber@users.noreply.github.com>
