final stage of the app

.env.example

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+# QR Code Manager Environment Configuration
+# Copy this file to .env and customize as needed
+
+# Security Settings
+SECRET_KEY=your-super-secret-key-change-me-in-production
+ADMIN_USERNAME=admin
+ADMIN_PASSWORD=admin123
+
+# Flask Configuration
+FLASK_ENV=production
+FLASK_DEBUG=false
+
+# Server Configuration
+HOST=0.0.0.0
+PORT=5000
+
+# Upload Configuration
+MAX_CONTENT_LENGTH=16777216
+
+# Default QR Code Settings
+DEFAULT_QR_SIZE=10
+DEFAULT_QR_BORDER=4
+DEFAULT_FOREGROUND_COLOR=#000000
+DEFAULT_BACKGROUND_COLOR=#FFFFFF