fix: convert Portainer stack to Docker Swarm mode with deploy labels

Changes:
- Moved all Traefik labels from root level to deploy.labels for Swarm compatibility
- Added deploy.restart_policy to backend, frontend, and MinIO services
- Removed restart: unless-stopped (incompatible with Swarm mode)
- Keeps depends_on for startup ordering

This fixes Gateway Timeout errors by ensuring Traefik can properly discover
and route to services when running in Docker Swarm mode.

Services updated:
- xpeditis-backend: Deploy labels + restart policy
- xpeditis-frontend: Deploy labels + restart policy
- xpeditis-minio: Deploy labels + restart policy

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

docker/portainer-stack.yml

@@ -40,7 +40,6 @@ services:
   # MinIO S3 Storage
   xpeditis-minio:
     image: minio/minio:latest
-    restart: unless-stopped
     command: server /data --console-address ":9001"
     volumes:
       - xpeditis_minio_data:/data
@@ -56,6 +55,12 @@ services:
       timeout: 10s
       retries: 3
       start_period: 20s
+    deploy:
+      restart_policy:
+        condition: any
+        delay: 5s
+        max_attempts: 3
+        window: 120s
       labels:
         - "traefik.enable=true"
         - "traefik.docker.network=traefik_network"
@@ -111,7 +116,6 @@ services:
   # Backend API (NestJS)
   xpeditis-backend:
     image: rg.fr-par.scw.cloud/weworkstudio/xpeditis-backend:preprod
-    restart: unless-stopped
     depends_on:
       - xpeditis-db
       - xpeditis-redis
@@ -174,6 +178,12 @@ services:
       retries: 3
       start_period: 60s
 
+    deploy:
+      restart_policy:
+        condition: any
+        delay: 5s
+        max_attempts: 3
+        window: 120s
       labels:
         - "traefik.enable=true"
         - "traefik.docker.network=traefik_network"
@@ -205,7 +215,6 @@ services:
   # Frontend (Next.js)
   xpeditis-frontend:
     image: rg.fr-par.scw.cloud/weworkstudio/xpeditis-frontend:preprod
-    restart: unless-stopped
     environment:
       NODE_ENV: production
       NEXT_PUBLIC_API_URL: https://api.preprod.xpeditis.com
@@ -220,6 +229,12 @@ services:
       retries: 3
       start_period: 40s
 
+    deploy:
+      restart_policy:
+        condition: any
+        delay: 5s
+        max_attempts: 3
+        window: 120s
       labels:
         - "traefik.enable=true"
         - "traefik.docker.network=traefik_network"