Improve deployment reliability by streamlining the application startup process

Updates the Dockerfile and entrypoint to remove Node.js 18 compatibility workaround and fixes cache corruption issues.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: e80fed01-7137-4997-b9af-dad57132d430
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/0715008c-7244-40f4-befc-26c014852236/db75d429-4075-4348-b179-bb283fb6d9d3.jpg

docker-entrypoint-simple.sh

@@ -51,9 +51,9 @@ fi
 
 echo "✅ Base de données configurée"
 
-# Démarrer l'application avec le script de polyfill Node.js 18
+# Démarrer l'application
 echo "🎯 Démarrage de RegisFlow..."
 export NODE_ENV=production
 export PORT=5000
 cd /app
-exec node server/prod-start.js
+exec node dist/index.js