Phase 9: Docker Deployment Setup - docker-compose with logging and port mapping

- Updated docker-compose.yml with port 8990:8000 mapping
- Fixed environment variables to match current .env configuration
- Added third PostgreSQL database (postgres_mirror) for mirror/sync data
- Added robust JSON file logging for all containers (10MB max, 3 files)
- Updated PostgreSQL credentials to use postgres/postgres
- Added health checks for all services
- Enhanced Dockerfile with logging environment variables
- Created .env.docker documentation file with deployment checklist
- Docker build verified successfully

backend/.env.docker

@@ -0,0 +1,83 @@
+# MTG Online - Docker Deployment Environment Configuration
+# ============================================================
+# Copy this file to .env and customize for your deployment.
+# 
+# SECURITY NOTES:
+# - Change all passwords before deploying to production
+# - Use strong, unique passwords for each database
+# - Rotate SECRET_KEY and JWT_SECRET_KEY regularly
+# - Never commit .env files to version control
+
+# =============================================================================
+# DATABASE CONFIGURATION
+# =============================================================================
+# Three PostgreSQL databases are used:
+#   1. mtgo_platform  - Main platform data (users, decks, collections)
+#   2. mtgdata        - MTG card data (cards, sets, prices)
+#   3. mtgo_mirror    - Mirror/sync data for offline access
+
+MTG_DATABASE_URL=postgresql+asyncpg://postgres:postgres@postgres_mtgdata:5432/mtgdata
+MTG_PLATFORM_DATABASE_URL=postgresql+asyncpg://postgres:postgres@postgres_platform:5432/mtgo_platform
+MTG_MIRROR_DATABASE_URL=postgresql+asyncpg://postgres:postgres@postgres_mirror:5432/mtgo_mirror
+
+# =============================================================================
+# BACKEND SERVER
+# =============================================================================
+# The backend runs on port 8000 inside the container, mapped to 8990 externally
+MTG_BACKEND_URL=http://localhost:8990
+
+# =============================================================================
+# MTGJSON DATA
+# =============================================================================
+# Directory for storing MTGJSON data files
+MTGJSON_DATA_DIR=/app/data
+MTGJSON_URL=https://mtgjson.com/api/v5/
+
+# =============================================================================
+# INTERACTION PIPELINE
+# =============================================================================
+# Minimum confidence score for interaction detection
+MTG_INTERACTION_MIN_CONFIDENCE=0.5
+# Batch size for interaction processing
+MTG_INTERACTION_BATCH_SIZE=1000
+# Enable review queue for low-confidence interactions
+MTG_INTERACTION_REVIEW_QUEUE=true
+
+# =============================================================================
+# LOGGING
+# =============================================================================
+# Log level: DEBUG, INFO, WARNING, ERROR, CRITICAL
+MTG_LOG_LEVEL=INFO
+# Log format: json or text
+MTG_LOG_FORMAT=json
+
+# =============================================================================
+# REDIS
+# =============================================================================
+# Redis URL for caching and session management
+REDIS_URL=redis://redis:6379/0
+
+# =============================================================================
+# SECURITY - CHANGE THESE IN PRODUCTION
+# =============================================================================
+SECRET_KEY=change-this-secret-key-in-production
+JWT_SECRET_KEY=change-this-jwt-secret-key-in-production
+
+# =============================================================================
+# VOLUME PATHS
+# =============================================================================
+DATA_DIR=/app/data
+UPLOAD_DIR=/app/uploads
+
+# =============================================================================
+# DEPLOYMENT CHECKLIST
+# =============================================================================
+# Before deploying:
+# [ ] Change all database passwords
+# [ ] Change SECRET_KEY and JWT_SECRET_KEY
+# [ ] Set MTG_LOG_LEVEL to WARNING or ERROR in production
+# [ ] Review health check intervals
+# [ ] Configure reverse proxy (nginx/caddy) for HTTPS
+# [ ] Set up log rotation and monitoring
+# [ ] Test migrations with new database credentials
+# [ ] Verify all three databases are accessible