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.

frontend/Dockerfile

@@ -0,0 +1,41 @@
+# ---- Build Stage ----
+FROM node:20-alpine AS build
+
+WORKDIR /app
+
+# Install dependencies
+COPY package.json ./
+RUN npm install
+
+# Copy source code
+COPY . .
+
+# Build for production
+RUN npm run build
+
+# ---- Production Stage ----
+FROM nginx:alpine AS production
+
+# Copy built assets
+COPY --from=build /app/dist /usr/share/nginx/html
+
+# Copy nginx config for SPA routing
+COPY nginx-frontend.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 80
+
+CMD ["nginx", "-g", "daemon off;"]
+
+# ---- Development Stage ----
+FROM node:20-alpine AS development
+
+WORKDIR /app
+
+COPY package.json ./
+RUN npm install
+
+COPY . .
+
+EXPOSE 5173
+
+CMD ["npm", "run", "dev", "--", "--host", "0.0.0.0"]