Add heroku deploy cron job

[banesullivan]

Resolve #22 by deploying from GitHub actions rather than Heroku's automatic deploys connected to GitHub

[banesullivan]

Bummer... I was hoping that by using pip's git protocol that the commit hash would be used somehow and prevent this... I really have no idea how any of that works under the hood.

Does Heroku's python build utility perform caching itself, or is it just saving the pip cache?

[banesullivan]

Perhaps here:

https://github.com/ResonantGeoData/RD-OpenGeo/blob/1c30fa3a80fb7054477329ab793435ba8e7f2ed7/requirements.txt#L3-L8

I need to specify a commit hash as well and have the CI update that hash in the cron job?

[banesullivan]

Closing and using dependabot with a regular release cycle from ResonantGeoData