Fix Docker entrypoint issues and improve containerization approach

Refactors the Dockerfile to use an inline script and addresses file permission issues for a more robust container build.

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/jJHXzkQ

docker-test-quick.sh

@@ -9,8 +9,8 @@ echo "🧹 Cleaning up existing containers..."
 docker-compose down -v 2>/dev/null || true
 docker system prune -f >/dev/null 2>&1 || true
 
-# Test de build 
-echo "🔨 Building fresh Docker image..."
+# Test de build avec la nouvelle approche
+echo "🔨 Building fresh Docker image (alternative approach)..."
 if docker-compose build --no-cache regisflow; then
     echo "✅ Build successful"
 else