Add helper script to setup CNC node

prepare-vms/cncsetup.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+if [ $(whoami) != ubuntu ]; then
+  echo "This script should be executed on a freshly deployed node,"
+  echo "with the 'ubuntu' user. Aborting."
+  exit 1
+fi
+if id docker; then
+  sudo userdel -r docker
+fi
+pip install --user awscli jinja2 pdfkit
+sudo apt-get install wkhtmltopdf xvfb
+tmux new-session \; send-keys "
+[ -f ~/.ssh/id_rsa ] || ssh-keygen
+eval \$(ssh-agent)
+ssh-add
+Xvfb :0 &
+export DISPLAY=:0
+mkdir -p ~/www
+sudo docker run -d -p 80:80 -v \$HOME/www:/usr/share/nginx/html nginx
+"