Resolve Docker issues preventing the application from starting correctly

Fixes "docker-entrypoint.sh not found" and improves Dockerfile for proper entrypoint execution and adds docker-test-quick.sh.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 4b008663-bd72-492b-b0b6-fa252367e730
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/0715008c-7244-40f4-befc-26c014852236/4b008663-bd72-492b-b0b6-fa252367e730/DWp0Qa4

DEPLOYMENT_GUIDE.md

@@ -117,13 +117,18 @@ docker-compose logs -f
 
 #### 1. Erreur "docker-entrypoint.sh: No such file or directory"
 ```bash
-# Solution : Rebuild avec cache vidé
+# Solution : Test rapide avec le script fourni
+./docker-test-quick.sh
+
+# Ou manuellement :
 docker-compose down
 docker system prune -f
 docker-compose build --no-cache
 docker-compose up -d
 ```
 
+**RÉSOLU** : Le script d'entrée est maintenant correctement placé dans `/app/docker-entrypoint.sh`
+
 #### 2. Base de données inaccessible
 ```bash
 # Vérifier la connexion