Figure out clean way to do Node + Postgres DB migrations

[celticr]

Originally created by @elimisteve on 2022-02-03T16:34:16Z
Original issue: SpringACT/digital-safe-upload-on-blob#7

---

More info: https://github.com/Kona-Connect/digital-safe-upload-on-blob/pull/5/files#r796499562

[celticr]

Closing: DB migrations discussion from 2022. Will be addressed in #227.