Update Dockerfile to correctly handle database migration files

Modify Dockerfile to create the 'drizzle' directory before copying migration files, resolving a deployment build error.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/397bca8c-984f-43ff-841a-10897aeb8140/ae4037a0-2a6f-4530-9bac-79b543286bda/p0c5kxJ

Dockerfile

@@ -15,6 +15,9 @@ COPY . .
 # Générer les migrations de base de données
 RUN npx drizzle-kit generate || echo "No schema changes to generate"
 
+# Créer le dossier drizzle s'il n'existe pas
+RUN mkdir -p drizzle
+
 # Build du frontend et backend
 RUN npm run build
 
@@ -37,9 +40,6 @@ COPY --from=builder /app/shared ./shared
 COPY --from=builder /app/drizzle.config.ts ./
 COPY --from=builder /app/drizzle ./drizzle
 
-# Créer le dossier uploads
-RUN mkdir -p uploads
-
 # Exposer le port 5000
 EXPOSE 5000