Initial commit: Inventory Barcode System

.env.example

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+# Environment Configuration Template
+# Copy this file to .env and update values for your environment
+
+# Server Configuration
+NODE_ENV=production
+PORT=3000
+HOST=0.0.0.0
+
+# Database Configuration
+DATABASE_PATH=./inventory.db
+DATABASE_BACKUP_PATH=./data/backups
+DATABASE_BACKUP_INTERVAL=3600000
+
+# File Upload Configuration
+UPLOAD_MAX_SIZE=10485760
+UPLOAD_ALLOWED_TYPES=application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,application/vnd.ms-excel
+TEMP_DIR=./data/temp
+
+# Export Configuration
+EXPORT_DIR=./data/exports
+EXPORT_RETENTION_DAYS=30
+
+# Logging Configuration
+LOG_LEVEL=info
+LOG_DIR=./logs
+LOG_MAX_SIZE=10m
+LOG_MAX_FILES=14d
+
+# Security Configuration
+CORS_ORIGIN=*
+HELMET_CSP_ENABLED=true
+REQUEST_TIMEOUT=30000
+
+# Performance Configuration
+CACHE_TTL=300000
+MAX_CONCURRENT_IMPORTS=3
+QUERY_TIMEOUT=5000
+
+# Backup Configuration
+BACKUP_ENABLED=true
+BACKUP_SCHEDULE=0 2 * * *
+BACKUP_RETENTION_DAYS=30