infra: Dockerfile (backend from monorepo root) + DigitalOcean App Platform
spec with health check and secret env vars. database: MongoDB Atlas + Voyage
vector-memory schema and the continual-learning loop notes.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Set up top-level structure (backend, frontend, database, infra, shared,
docs) with .gitkeep placeholders, root README, and .gitignore.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>