fix: replace wget healthcheck with node http for web container

oven/bun:1-slim has no wget/curl. Use node's built-in http module
(available via bun's node-fallback) for the /api/health check.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -65,7 +65,7 @@ services:
     networks:
       - caddy-network
     healthcheck:
-      test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://localhost:3000/api/health"]
+      test: ["CMD", "node", "-e", "require('http').get('http://localhost:3000/api/health',r=>{process.exit(r.statusCode<400?0:1)}).on('error',()=>process.exit(1))"]
       interval: 30s
       timeout: 10s
       retries: 3