Update Dockerfile comments wrt deprecation of Docker Toolbox
Update Dockerfile comments wrt deprecation of Docker Toolbox

asciinema/asciinema-server,asciinema/asciinema.org,asciinema/asciinema-server,asciinema/asciinema.org,asciinema/asciinema-server,asciinema/asciinema-server,asciinema/asciinema.org,asciinema/asciinema.org