Update Docker Compose for self-hosting #14
Description
There's a docker-compose.yml in the repo but it probably needs updating after the dashboard WASM changes.
Should have:
- reeverb service built from the Dockerfile (which now handles the trunk build)
- PostgreSQL 16
- Correct env vars (DATABASE_URL, JWT_SECRET, RUST_LOG)
- Volume for Postgres persistence
- Health check on /health
No S3/MinIO yet — media uploads aren't implemented. That gets added with video testimonials.