#!/bin/sh
while [ ! -f /app/server.js ]; do sleep 2; done

while true; do
  STAMP=$(cat /app/.deploy-timestamp 2>/dev/null)
  node /app/server.js &
  PID=$!
  while [ "$(cat /app/.deploy-timestamp 2>/dev/null)" = "$STAMP" ]; do
    sleep 2
  done
  kill $PID
  wait $PID 2>/dev/null
done