docker-compose.yml

services:
  zero:
    image: python:3.12-slim
    working_dir: /app
    environment:
      ZERO_ENV: production
      ZERO_HOME: /data
      ZERO_DATABASE_URL: sqlite:////data/zero.db
    env_file:
      - ./zero.env
    volumes:
      - ./:/app
      - zero-data:/data
    ports:
      - "127.0.0.1:8000:8000"
    command: >
      sh -lc "pip install --no-cache-dir -e . &&
              zero-develop migrate &&
              uvicorn zero.main:app --host 0.0.0.0 --port 8000"
    restart: unless-stopped

  # Optional PostgreSQL backend (GAP 2). Start with:
  #   docker compose --profile pg up -d postgres
  # then set ZERO_DATABASE_URL=postgresql://zero:zero@postgres:5432/zero
  # and install the [pg] extra inside the zero service.
  postgres:
    image: postgres:16
    profiles: ["pg"]
    environment:
      POSTGRES_USER: zero
      POSTGRES_PASSWORD: zero
      POSTGRES_DB: zero
    volumes:
      - pg-data:/var/lib/postgresql/data
    ports:
      - "127.0.0.1:5432:5432"
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U zero -d zero"]
      interval: 5s
      timeout: 3s
      retries: 12
    restart: unless-stopped
volumes:
  zero-data:
  pg-data: