Update the application to use port 3000 across all services

Adjusts port configurations from 5000 to 3000 in .replit, Dockerfile, docker-compose.yml, replit.md and server/index.ts for consistent service deployment.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: dec54137-d5a2-4406-8ad4-5f2f9fb110bf
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/0715008c-7244-40f4-befc-26c014852236/5d315300-98fa-429a-abb0-4fdce6a2e3c9.jpg

Dockerfile

@@ -64,11 +64,11 @@ RUN chmod +x /usr/local/bin/docker-entrypoint.sh
 USER regisflow
 
 # Exposer le port
-EXPOSE 5000
+EXPOSE 3000
 
 # Variables d'environnement de production
 ENV NODE_ENV=production
-ENV PORT=5000
+ENV PORT=3000
 ENV NODE_OPTIONS="--max-old-space-size=512"
 
 # Labels pour la documentation
@@ -78,7 +78,7 @@ LABEL description="Application RegisFlow pour la gestion des ventes de feux d'ar
 
 # Health check
 HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
-  CMD wget --no-verbose --tries=1 --spider http://localhost:5000/ || exit 1
+  CMD wget --no-verbose --tries=1 --spider http://localhost:3000/ || exit 1
 
 # Point d'entrée avec script de démarrage
 ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]