.
├── openapi.yaml      # Kontrak API (OpenAPI 3.0.3)
├── app.py            # Backend Flask
├── requirements.txt  # Dependencies
└── .env.example     # Template DATABASE_URL

Setup

Install dependencies:
```
pip install -r requirements.txt
```
Buat file .env:
```
copy .env.example .env
```

Isi .env dengan connection string Neon:

DATABASE_URL=postgresql://user:pass@host/neondb?sslmode=require

Jalankan Backend

python -m flask --app app --env-file .env run

Server berjalan di http://localhost:5000.

Endpoint

Method	Path	Fungsi
GET	/products	Ambil semua produk
GET	/products/{id}	Ambil satu produk
POST	/products	Tambah produk baru
DELETE	/products/{id}	Hapus produk

Test dengan curl

# Ambil semua produk
curl http://localhost:5000/products

# Ambil satu produk
curl http://localhost:5000/products/1

# Tambah produk baru
curl -X POST http://localhost:5000/products \
  -H "Content-Type: application/json" \
  -d '{"name":"Monitor","price":1500000,"stock":5}'

# Hapus produk
curl -X DELETE http://localhost:5000/products/4

Database

Menggunakan PostgreSQL Neon. Tabel products sudah tersedia dengan struktur:

Field	Tipe
id	integer (PK)
name	varchar(100)
price	numeric(12,2)
stock	integer