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.

scripts/generate_sitemap.py

@@ -0,0 +1,86 @@
+#!/usr/bin/env python3
+"""
+generate_sitemap.py
+Generates sitemap.xml for SEO.
+
+Usage:
+  python scripts/generate_sitemap.py --domain https://yourdomain.com
+"""
+
+import argparse
+from datetime import datetime
+
+
+TOOLS = [
+    '/tools/pdf-to-word',
+    '/tools/word-to-pdf',
+    '/tools/compress-pdf',
+    '/tools/image-converter',
+    '/tools/video-to-gif',
+    '/tools/word-counter',
+    '/tools/text-cleaner',
+]
+
+PAGES = [
+    '/',
+    '/about',
+    '/privacy',
+]
+
+
+def generate_sitemap(domain: str) -> str:
+    today = datetime.now().strftime('%Y-%m-%d')
+    urls = []
+
+    # Home page — highest priority
+    urls.append(f'''  <url>
+    <loc>{domain}/</loc>
+    <lastmod>{today}</lastmod>
+    <changefreq>weekly</changefreq>
+    <priority>1.0</priority>
+  </url>''')
+
+    # Tool pages — high priority
+    for tool in TOOLS:
+        urls.append(f'''  <url>
+    <loc>{domain}{tool}</loc>
+    <lastmod>{today}</lastmod>
+    <changefreq>monthly</changefreq>
+    <priority>0.9</priority>
+  </url>''')
+
+    # Static pages — lower priority
+    for page in PAGES[1:]:
+        urls.append(f'''  <url>
+    <loc>{domain}{page}</loc>
+    <lastmod>{today}</lastmod>
+    <changefreq>monthly</changefreq>
+    <priority>0.5</priority>
+  </url>''')
+
+    sitemap = f'''<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+{chr(10).join(urls)}
+</urlset>'''
+
+    return sitemap
+
+
+def main():
+    parser = argparse.ArgumentParser(description='Generate sitemap.xml')
+    parser.add_argument('--domain', type=str, required=True, help='Site domain (e.g. https://yourdomain.com)')
+    parser.add_argument('--output', type=str, default='frontend/public/sitemap.xml', help='Output file path')
+    args = parser.parse_args()
+
+    domain = args.domain.rstrip('/')
+    sitemap = generate_sitemap(domain)
+
+    with open(args.output, 'w', encoding='utf-8') as f:
+        f.write(sitemap)
+
+    print(f"Sitemap generated: {args.output}")
+    print(f"URLs: {len(TOOLS) + len(PAGES)}")
+
+
+if __name__ == '__main__':
+    main()