Implements the FileStorage abstraction (uploads/<pondId>/<fileId> on the
mounted volume), the attachments model, and POST /ponds/:id/files, GET
/media/:fileId, DELETE /files/:id. Uploads are validated by sniffing
magic bytes rather than trusting the client's Content-Type/filename
(catches a renamed .html-as-.png), checked against the max_file_bytes
and storage_bytes quotas, and served with nosniff + immutable caching.
Closes#27
Multi-stage images: web (workspace build baked into unprivileged
nginx with SPA fallback, asset caching, /healthz) and api (pnpm deploy
bundle with the prisma CLI for migrate-on-start, non-root, node-based
healthcheck). deploy/compose/docker-compose.yml defines the stage
stack (web, api, db) with frontend/internal networks, localhost-only
published ports for the host reverse proxy, log rotation, and named
volumes; .env.example documents every variable. compose.dev.yml layers
hot-reloading dev containers (or database-only usage) over the same
definition. Verified locally: full stack healthy, SPA fallback, readyz
green after automatic migration, db not reachable from outside.
Closes#6
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
