Add complete frontend implementation and Docker deployment setup

- Implement React frontend with TypeScript and Tailwind CSS
- Add scrappbook.de-inspired UI design with photo galleries
- Implement authentication, photo viewing, and download features
- Add Docker Swarm configuration with Traefik reverse proxy
- Set up Drone CI/CD pipeline for automated deployments
- Add monitoring stack with Prometheus and Grafana
- Create comprehensive deployment documentation
- Add simple local development setup with docker-compose.local.yml

Features:
- Password-protected galleries with expiration warnings
- Responsive photo grid with lightbox viewer
- Bulk download functionality
- Hot reload development environment
- Email testing with Mailhog
- Production-ready deployment scripts

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

frontend/src/components/gallery/ExpirationBanner.tsx

@@ -0,0 +1,53 @@
+import React from 'react';
+import { AlertTriangle, Download } from 'lucide-react';
+import Countdown from 'react-countdown';
+import { parseISO } from 'date-fns';
+
+interface ExpirationBannerProps {
+  daysRemaining: number;
+  expiresAt: string;
+}
+
+export const ExpirationBanner: React.FC<ExpirationBannerProps> = ({ 
+  daysRemaining, 
+  expiresAt 
+}) => {
+  const expirationDate = parseISO(expiresAt);
+  
+  const countdownRenderer = ({ days, hours, minutes, completed }: any) => {
+    if (completed) {
+      return <span>Gallery has expired</span>;
+    } else {
+      return (
+        <span className="font-mono">
+          {days}d {hours}h {minutes}m
+        </span>
+      );
+    }
+  };
+
+  const getBannerColor = () => {
+    if (daysRemaining <= 1) return 'bg-red-600';
+    if (daysRemaining <= 3) return 'bg-amber-600';
+    return 'bg-amber-500';
+  };
+
+  return (
+    <div className={`${getBannerColor()} text-white sticky top-0 z-50`}>
+      <div className="container py-3">
+        <div className="flex items-center justify-between">
+          <div className="flex items-center">
+            <AlertTriangle className="w-5 h-5 mr-2 animate-pulse" />
+            <span className="font-medium">
+              Gallery expires in <Countdown date={expirationDate} renderer={countdownRenderer} />
+            </span>
+          </div>
+          <div className="flex items-center text-sm">
+            <Download className="w-4 h-4 mr-1" />
+            <span>Download your photos now!</span>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+};