feat: Initialize frontend with React, Vite, and Tailwind CSS

- Set up main entry point for React application.
- Create About, Home, NotFound, Privacy, and Terms pages with SEO support.
- Implement API service for file uploads and task management.
- Add global styles using Tailwind CSS.
- Create utility functions for SEO and text processing.
- Configure Vite for development and production builds.
- Set up Nginx configuration for serving frontend and backend.
- Add scripts for cleanup of expired files and sitemap generation.
- Implement deployment script for production environment.

backend/requirements.txt

@@ -0,0 +1,27 @@
+# Core Framework
+flask>=3.0,<4.0
+flask-cors>=4.0,<5.0
+flask-limiter[redis]>=3.5,<4.0
+flask-talisman>=1.1,<2.0
+gunicorn>=22.0,<23.0
+python-dotenv>=1.0,<2.0
+
+# Task Queue
+celery[redis]>=5.3,<6.0
+redis>=5.0,<6.0
+flower>=2.0,<3.0
+
+# File Processing
+Pillow>=10.0,<11.0
+python-magic>=0.4.27,<1.0
+ffmpeg-python>=0.2,<1.0
+
+# AWS
+boto3>=1.34,<2.0
+
+# Security
+werkzeug>=3.0,<4.0
+
+# Testing
+pytest>=8.0,<9.0
+pytest-flask>=1.3,<2.0