docker-compose.yml

# ============================================================================
# Online Exam IDE — Docker Compose
# ============================================================================
# 
# IMPORTANT (MongoDB Atlas IP Whitelisting):
#   MongoDB Atlas requires your IP address to be whitelisted before allowing
#   connections. When running in Docker (locally or on a server), you must:
#   
#   1. Go to MongoDB Atlas → Network Access → Add IP Address
#   2. Either add your server/host IP, OR use 0.0.0.0/0 to allow all IPs
#      (suitable for development; restrict in production)
#   3. The backend container uses certifi for TLS and dnspython for SRV
#      record resolution, so Atlas SRV connection strings work correctly.
#
# Usage:
#   docker-compose up --build        # Build and start
#   docker-compose up -d             # Detached mode
#   docker-compose down              # Stop and remove
#   docker-compose logs -f backend   # Follow backend logs
#
# Access:
#   Frontend:  http://localhost:8501
#   Backend:   http://localhost:8000
#   API Docs:  http://localhost:8000/docs
# ============================================================================

services:
  backend:
    build:
      context: .
      dockerfile: Dockerfile.backend
    container_name: exam-ide-backend
    ports:
      - "8000:8000"
    env_file:
      - backend/.env
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "python", "-c", "import urllib.request; urllib.request.urlopen('http://localhost:8000/health')"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 10s

  frontend:
    build:
      context: .
      dockerfile: Dockerfile.frontend
    container_name: exam-ide-frontend
    ports:
      - "8501:8501"
    environment:
      - BACKEND_URL=http://backend:8000
    depends_on:
      backend:
        condition: service_healthy
    restart: unless-stopped