chore: migrate Coolify deploy to pull-based images from Gitea registry

- Point docker-compose.images.yaml at registry.ulivargas.dev images
- Add restart: unless-stopped to postgres/redis/minio
- Restore dashboard build heap to 8GB (4GB caused vite OOM)
- Use node:24.18.0-slim for jobs to share base layers

docker-compose.images.yaml

@@ -17,6 +17,7 @@ services:
   postgres:
     image: postgres:16-alpine
     container_name: cio-postgres
+    restart: unless-stopped
     environment:
       POSTGRES_DB: ${POSTGRES_DB:-classroomio}
       POSTGRES_USER: ${POSTGRES_USER:-postgres}
@@ -39,6 +40,7 @@ services:
   redis:
     image: redis:7-alpine
     container_name: cio-redis
+    restart: unless-stopped
     command: ['redis-server', '--appendonly', 'yes']
     volumes:
       - redis-data:/data
@@ -52,6 +54,7 @@ services:
   minio:
     image: minio/minio:latest
     container_name: cio-minio
+    restart: unless-stopped
     command: server /data --console-address ":9001"
     ports:
       - '9000:9000'
@@ -88,7 +91,7 @@ services:
       - minio
 
   api:
-    image: classroomio/api:${CIO_VERSION:-latest}
+    image: registry.ulivargas.dev/ulivargas/classroomio-api:${CIO_VERSION:-latest}
     container_name: cio-api
     ports:
       - '3081:3081'
@@ -149,7 +152,7 @@ services:
     restart: unless-stopped
 
   dashboard:
-    image: classroomio/dashboard:${CIO_VERSION:-latest}
+    image: registry.ulivargas.dev/ulivargas/classroomio-dashboard:${CIO_VERSION:-latest}
     container_name: cio-dashboard
     ports:
       - '3082:3082'
@@ -185,7 +188,7 @@ services:
   # Background worker (BullMQ). Drains the Redis queue: video processing, transcription,
   # AI course generation, and emails.
   jobs:
-    image: classroomio/jobs:${CIO_VERSION:-latest}
+    image: registry.ulivargas.dev/ulivargas/classroomio-jobs:${CIO_VERSION:-latest}
     container_name: cio-jobs
     depends_on:
       postgres: