upstart node.conf for launching node app with npm and installing dependencies on amazon ubuntu ami

node.conf

# /etc/init/node.conf
description 'node.js app production'
author 'ivarprudnikov.com'
env NAME=app-name
env ENV=production
env PORT=8080
env LOG_FILE=/var/log/app-name.log
env USER=ubuntu
env NPM_BIN=/usr/bin/npm
env APP_LOCATION=/var/www/thisismyapp
env REPO=https://github.com/aprudnikovas/youtube-hoover.git
env DB_URI=mongodb://127.0.0.1:27017/youtube-hoover

start on started networking
stop on stopping networking

# Respawn in case of a crash, with default parameters
respawn

pre-start script
  touch $LOG_FILE
  chown $USER:$USER $LOG_FILE
  sudo mkdir -p $APP_LOCATION
  girror $REPO $APP_LOCATION
  echo ">>>>> Installing $NAME dependencies" >> $LOG_FILE
  cd $APP_LOCATION
  sudo $NPM_BIN install >> $LOG_FILE 2>&1
  sudo chown -R $USER:$USER $APP_LOCATION
end script

script
  export NODE_ENV=$ENV
  export PORT=$PORT
  export DB_URI=$DB_URI
  sudo iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports $PORT
  cd $APP_LOCATION
  exec su -s /bin/sh -c 'exec "$0" "$@"' $USER -- $NPM_BIN start >> $LOG_FILE 2>&1
end script

post-start script
echo ">>>>> App $NAME started" >> $LOG_FILE
end script