docker-compose.yml

version: '3.8'

# Docker Compose orchestrates multiple containers.
# One command: `docker-compose up` starts everything.
# Great for local development — mirrors your production setup.

services:

  # PostgreSQL: our main database
  db:
    image: postgres:15-alpine      # Small Alpine-based Postgres image
    container_name: shramiklink-db
    environment:
      POSTGRES_DB: shramiklink          # Database name
      POSTGRES_USER: shramiklink        # Username
      POSTGRES_PASSWORD: shramiklink123 # Password
    ports:
      - "5432:5432"                # host:container — access DB at localhost:5432
    volumes:
      - postgres_data:/var/lib/postgresql/data  # Persist data across restarts
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U shramiklink"]
      interval: 10s
      timeout: 5s
      retries: 5

  # Redis: our cache for worker availability
  redis:
    image: redis:7-alpine
    container_name: shramiklink-redis
    ports:
      - "6379:6379"
    volumes:
      - redis_data:/data
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 10s
      timeout: 5s
      retries: 5

  # Spring Boot backend: our main API server
  backend:
    build:
      context: ./backend      # Build from the backend/ folder's Dockerfile
    container_name: shramiklink-backend
    ports:
      - "8080:8080"
    environment:
      # These override application.properties values
      DATABASE_URL: jdbc:postgresql://db:5432/shramiklink
      DB_USERNAME: shramiklink
      DB_PASSWORD: shramiklink123
      REDIS_HOST: redis
      REDIS_PORT: 6379
      JWT_SECRET: change-this-in-production-use-a-long-random-string
      OTP_MOCK: "true"          # Set to false in production + add SMS gateway
    depends_on:
      db:
        condition: service_healthy   # Wait for DB to be ready before starting
      redis:
        condition: service_healthy
    restart: unless-stopped    # Auto-restart if backend crashes

# Named volumes: persist data even when containers are removed
volumes:
  postgres_data:
  redis_data: