Local Storage Version

[dvn0]

I am excited to base a project on this work, so I was curious if you had any intention to add support for local storage.

Then I found your comment on another issue:

Right now the database is dependent on Firestore in GCP so there's not much value in running a local instance other than for development. I'm gonna work on implementing a local storage version so that it's runnable locally soon though!

Originally posted by @arussellsaw in #7 (comment)

What do you have in mind? Do you have any un-pushed work on this already, perhaps?

SQLite or PostgreSQL would be an option I would consider if I were to do this myself. However simply using directories on the filesystem could be a viable option, as well.