Implement complete frontend with admin panel and theme system

- Add admin authentication and dashboard
- Create event management pages (list, create, edit, archive)
- Implement gallery enhancements (search, sorting, bulk download)
- Add email configuration and archive management pages
- Integrate Umami analytics with tracking throughout the app
- Add comprehensive error boundaries and loading states
- Implement accessibility features (WCAG 2.1 AA compliance)
- Create theme system with preset themes and customization
- Add branding settings and company information management
- Fix backend database initialization and health check
- Configure proper API URLs and environment variables

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

Co-Authored-By: Claude <noreply@anthropic.com>

backend/Dockerfile.dev

@@ -0,0 +1,29 @@
+FROM node:18-alpine
+
+WORKDIR /app
+
+# Install dumb-init for proper signal handling
+RUN apk add --no-cache dumb-init
+
+# Copy package files
+COPY package*.json ./
+
+# Install all dependencies (including dev)
+RUN npm install
+
+# Copy application files
+COPY . .
+
+# Create necessary directories
+RUN mkdir -p storage/events/active storage/events/archived storage/thumbnails data logs
+
+# Create non-root user
+RUN addgroup -g 1001 -S nodejs && adduser -S nodejs -u 1001
+RUN chown -R nodejs:nodejs /app
+
+USER nodejs
+
+EXPOSE 3000
+
+ENTRYPOINT ["dumb-init", "--"]
+CMD ["npm", "run", "dev"]