New DB options since #27: file (JSON) or baserow (cloud managed or self-hosted).
A small migration step must be done from 0.4 to 0.5 (convert db.js => db.json) if using file DB_TYPE. Also, all environment variables must be set, as per the (slightly more documented) README.
This version also reduces internal complexity through some small refactoring tasks (notably, the consolidation of meetsService.js) and eases the design for other eventual backend sources, such as Airtable or Supabase.