allow scheduled updates to run from a worker process, e.g. Heroku Scheduler

[apaleslimghost]

for Heroku free tier, an alternative to running the scheduled updates from the web process could be a worker process that runs from an addon like Heroku Scheduler. this could run whether the web dyno is sleeping or not.

[rowanmanning]

Ooh that's a good idea, and would probably be cheaper than my current approach of just paying for the dynos 😂 I like the idea of supporting both ways of scheduling updates