Add install_lessc and allowed_hosts to deployment

Remove invalid --noinput flag from compress command
Well, `nodejs-legacy` worked like a charm on my laptop, but it isn't available in the older ubuntu 12.04 we have in production. I'd prefer to be running the current  LTS, but it isn't available on mrepo.mozilla.org yet, which is what we're locked into via puppet, so we'll have to stick with this method of symlink creation for now.