docker-compose.yml

version: "3.9"

services:
  # Redis — our message broker and job store
  redis:
    image: redis:7-alpine
    ports:
      - "6379:6379"      # expose Redis to host for debugging
    volumes:
      - redis_data:/data  # persist data across container restarts
    command: redis-server --appendonly yes  # enable AOF persistence
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 5s
      timeout: 3s
      retries: 5

  # goqueue — our app
  goqueue:
    build: .             # build from Dockerfile in current directory
    ports:
      - "8080:8080"      # host:container port mapping
    environment:
      - REDIS_ADDR=redis:6379   # use service name, not localhost
      - WORKER_COUNT=5
      - API_PORT=8080
      - MAX_RETRIES=3
    depends_on:
      redis:
        condition: service_healthy  # wait for Redis ping to succeed
    restart: unless-stopped         # auto-restart on crash

# Named volume — data persists even when containers are removed
volumes:
  redis_data: