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/Dockerfile

@@ -0,0 +1,41 @@
+FROM python:3.12-slim-bookworm
+
+# Prevent interactive prompts during package installation
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Install system dependencies for file processing
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libreoffice-core \
+    libreoffice-writer \
+    libreoffice-calc \
+    libreoffice-draw \
+    ghostscript \
+    ffmpeg \
+    libmagic1 \
+    imagemagick \
+    curl \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set working directory
+WORKDIR /app
+
+# Copy requirements first for Docker layer caching
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY . .
+
+# Create temp directories
+RUN mkdir -p /tmp/uploads /tmp/outputs
+
+# Expose port
+EXPOSE 5000
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --retries=3 \
+    CMD curl -f http://localhost:5000/api/health || exit 1
+
+# Run with Gunicorn
+CMD ["gunicorn", "--bind", "0.0.0.0:5000", "--workers", "4", "--timeout", "120", "wsgi:app"]