I have started using spark core for my prototype and it is really working out good. I am looking for information on if there is any document or tutorial on how to take the prototype all the way to production. Can I use the spark core directly in my PCB or should I take the soft IP from github and do it afresh? How does the spark cloud work when I scale out the product to a huge number of commercial devices? Do I keep using the spark cloud service and flash all the devices from there or should I build the spark cloud myself in my own cloud?