original: https://gist.github.com/simonw/50e14b9a3e829355d6d43f0f12f91e74
I started a project on a Hobby Dev plan (free, limit 10,000 rows), and then later needed to upgrade it to Hobby Basic ($9/month, limit 10,000,000 rows).
<appname>
with the name of your Heroku app.