fix: increase healthcheck timeout to 10s for node cold-start overhead

Node.js `-e` cold-start exceeds 3s on resource-constrained VPS, causing
1000+ consecutive false-negative health failures. Bumped timeout to 10s
and start_period to 10s.

Author: rz1989s

Dockerfile

@@ -30,7 +30,7 @@ USER nodejs
 ENV NODE_ENV=production
 EXPOSE 3100
 
-HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=3 \
   CMD node -e "require('http').get('http://localhost:3100/health', (r) => { if (r.statusCode !== 200) process.exit(1) })"
 
 CMD ["node", "dist/index.js"]