Improve database connection reliability and add debugging tools

Enhances database connection robustness with retry logic and introduces `debug-docker.sh` for easier debugging.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 91318273-c764-4fd4-be04-bdc12c38af32
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/0715008c-7244-40f4-befc-26c014852236/6e755801-08e8-4492-805e-ac3610de5a2a.jpg

debug-docker.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# Script de debug pour Docker RegisFlow
+echo "🔍 Debug Docker RegisFlow"
+
+echo "1. État des containers:"
+docker-compose ps
+
+echo ""
+echo "2. Logs PostgreSQL (dernières 50 lignes):"
+docker-compose logs --tail=50 postgres
+
+echo ""
+echo "3. Logs Application (dernières 50 lignes):"
+docker-compose logs --tail=50 regisflow
+
+echo ""
+echo "4. Test de connectivité réseau:"
+echo "   - Test ping postgres depuis regisflow:"
+docker-compose exec regisflow ping -c 3 postgres 2>/dev/null || echo "❌ Ping échoué"
+
+echo ""
+echo "5. Variables d'environnement dans l'application:"
+docker-compose exec regisflow env | grep -E "(DATABASE_URL|POSTGRES|NODE_ENV)"
+
+echo ""
+echo "6. Test manuel de connexion PostgreSQL:"
+docker-compose exec postgres pg_isready -U regisflow -d regisflow
+
+echo ""
+echo "7. Processus dans le container PostgreSQL:"
+docker-compose exec postgres ps aux
+
+echo ""
+echo "8. Test de port PostgreSQL depuis l'hôte:"
+timeout 5 bash -c "</dev/tcp/localhost/5433" && echo "✅ Port 5433 accessible" || echo "❌ Port 5433 inaccessible"
+
+echo ""
+echo "🏁 Debug terminé"