init commit

.env.example

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+# Environment Configuration
+NODE_ENV=development
+PORT=3000
+
+# Database
+MONGODB_URI=mongodb://localhost:27017/smartsoltech
+
+# JWT Secret
+JWT_SECRET=your_super_secret_jwt_key_here_change_in_production
+
+# Session Secret
+SESSION_SECRET=your_session_secret_here_change_in_production
+
+# Telegram Bot
+TELEGRAM_BOT_TOKEN=your_telegram_bot_token_here
+TELEGRAM_CHAT_ID=your_telegram_chat_id_here
+
+# Email Configuration (for contact forms)
+EMAIL_HOST=smtp.gmail.com
+EMAIL_PORT=587
+EMAIL_USER=your_email@gmail.com
+EMAIL_PASS=your_email_password
+
+# Admin Credentials (default)
+ADMIN_EMAIL=admin@smartsoltech.kr
+ADMIN_PASSWORD=admin123456
+
+# File Upload
+MAX_FILE_SIZE=10485760
+UPLOAD_PATH=./public/uploads
+
+# Site Configuration
+SITE_URL=https://smartsoltech.kr
+SITE_NAME=SmartSolTech