compose.yaml

services:
  db:
    image: postgres:18-alpine
    restart: unless-stopped
    ports:
      - 5432:5432
    environment:
      POSTGRES_USER: ${POSTGRES_USER}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
      POSTGRES_DB: ${POSTGRES_DB}
    volumes:
      - pg_data:/var/lib/postgresql
    healthcheck:
      interval: 30s
      timeout: 10s
      retries: 3
      test: ['CMD', 'pg_isready', '-U', '${POSTGRES_USER:-postgres}']

  redis:
    image: redis:8-alpine
    restart: unless-stopped
    ports:
      - 6379:6379
    # No persistence — sessions are ephemeral; users re-authenticate on restart
    command: redis-server --save "" --appendonly no
    healthcheck:
      interval: 10s
      timeout: 5s
      retries: 3
      test: ['CMD', 'redis-cli', 'ping']

volumes:
  pg_data: