Add .env.example

.env.example

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+# Server Configuration
+NODE_ENV=development
+PORT=5000
+HOST=0.0.0.0
+
+# Features Control
+ENABLE_API=true
+ENABLE_INTERACTIVE_BOT=true
+
+# WhatsApp Bot Configuration
+BOT_NAME=WhatsApp Hybrid Gateway
+SESSION_DIR=./session
+UPLOADS_DIR=./uploads
+LOGS_DIR=./logs
+MEDIA_DIR=./media
+
+# Security (uncomment and set in production)
+# API_KEY=your-secret-api-key-here
+CORS_ORIGIN=*
+
+# File Upload Limits (MB)
+MAX_FILE_SIZE=100
+
+# Logging Configuration
+LOG_LEVEL=info
+LOG_TO_FILE=false
+
+# Rate Limiting (optional)
+RATE_LIMIT_ENABLED=false
+RATE_LIMIT_MAX=100
+RATE_LIMIT_WINDOW=3600000
+
+# Advanced Features (optional)
+ENABLE_WEBHOOKS=false
+WEBHOOK_URL=
+ENABLE_ANALYTICS=false
+
+# Database Configuration (for future features)
+# DB_HOST=localhost
+# DB_PORT=5432
+# DB_NAME=whatsapp_gateway
+# DB_USER=postgres
+# DB_PASS=your-password
+
+# Redis Configuration (for advanced rate limiting)
+# REDIS_HOST=localhost
+# REDIS_PORT=6379
+# REDIS_PASSWORD=