The Big Picture FloodLine runs as 5 Docker containers orchestrated by Docker Compose: Browser ──▶ nginx:80 ├── /api/* ──▶ backend:8000 (FastAPI) └── /* ──▶ frontend:3000 (Next.js) worker (APScheduler) ──▶ postgres:5432 backend ──▶ postgres:5432 There is no Redis, no Celery, no Kubernetes. The entire system runs on a single machine. Why These Choices