I suppose one could forego the config.json file completely and use environment variables to configure their NodeBB. The properties are the same.
url=http://localhost:4567 database=redis node app.js etc...
Very simple this one, assuming you've not used it before. Log in to your digital ocean account, click billing, then Payment Methods locate the promo code box near the bottom and paste this in.
Click Billing again on the left.
Aaaand you're welcome.
Thanks for sharing this @a_5mith. I was already using a similar code from a while back, and seeing this made me remember I still had $10 of credit to use for testing things.
Sadly they don't allow you to stack their coupon codes.