# Fixture Invoicing > **⚠ THIS IS A FIXTURE, NOT A PRODUCT.** > A deliberately minimal invoicing app used as a test surface for the > [Soleprint](../../README.md) framework. Seed data is obviously placeholder > ("Acme Widget Co.", "Test Customer 001"). Do not mistake this for real > invoicing software. ## What's here - `backend/` — FastAPI + SQLAlchemy against Postgres - `frontend/` — Vue 3 + Vite, three pages (customers, invoices, invoice detail) - `docker-compose.yml` — backend + frontend + postgres as three containers ## Entities ``` Customer ──< Invoice ──< LineItem └──────< Payment ``` - `Customer` — name, email - `Invoice` — number, customer_id (FK), issued_at, due_at, status - `LineItem` — invoice_id (FK), description, quantity, unit_price - `Payment` — invoice_id (FK), amount, method, paid_at ## Run it standalone ```bash cd examples/fixture-invoicing docker compose up --build ``` - Backend: http://localhost:8100 - Frontend: http://localhost:3100 - Postgres: localhost:5532 (user `postgres`, password `fixture`, db `fixture`) ## Run it wrapped by soleprint The `cfg/sample/` room wraps this fixture. See the main soleprint docs. ```bash cd ../.. # back to repo root python build.py --cfg sample cd gen/sample && ./ctrl/start.sh ```