Add lightweight container rating/upvote system using serverless KV storage

[ajnart]

Feature Suggestion:
Add a simple, database-free rating/upvote system for containers using serverless edge storage (e.g., Cloudflare Workers KV, Vercel Edge Config, or similar).

Why:

• Help users discover popular and well-tested containers
• No traditional database infrastructure needed
• Minimal hosting overhead using free-tier serverless offerings
• Community validation without complex marketplace features

Proposed Implementation:

• Simple upvote counter for each container definition
• Optional: Basic rating (1-5 stars) stored in KV pairs
• Key format: container:{id}:upvotes or container:{id}:rating
• Anonymous upvoting with IP/session throttling to prevent spam
• Display upvote counts and ratings in the container gallery UI
• Optional: Sort/filter containers by popularity or rating

Technical Approach:

• Use Cloudflare Workers KV (free tier: 100k reads/day, 1k writes/day)
• Or use Vercel Edge Config / Deno KV for similar functionality
• Simple REST API endpoint: POST /api/vote and GET /api/stats/:containerId
• Client-side caching to reduce KV reads
• No user accounts needed - just simple community metrics

Benefits:

• Zero database maintenance
• Extremely low hosting costs (likely free tier sufficient)
• Fast edge-based responses
• Easy to implement and iterate on

This would provide community feedback signals without the complexity of a full marketplace or comment system.