Exclude backup directories and improve YAML formatting

Add exclusion patterns for Nextcloud and Gitea backup directories to avoid
backing up redundant data. Also normalize YAML indentation to 2 spaces for
consistency.

Changes:
- Exclude /opt/nextcloud/backups from backups
- Exclude /opt/gitea/backups from backups
- Add commented suggestions for preview and updater exclusions
- Normalize YAML indentation from 4 spaces to 2 spaces

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

config.yaml

@@ -5,34 +5,40 @@
 
 # Repository Borg - utilise la variable d'environnement
 repositories:
-    - path: "${BORG_REPO}"
-      label: production
+  - path: "${BORG_REPO}"
+    label: production
 
 # Chemins sources à sauvegarder
 source_directories:
-    - /var/www
-    - /srv/minecraftserver
-    - /srv/reddiscordbot
-    - /srv/waltercoiffure
-    - /etc
-    - /opt/nextcloud
-    - /opt/traefik
-    - /opt/n8n
-    - /opt/portainer
-    - /opt/uptime-kuma
-    - /opt/vaultwarden
-    - /opt/mailcow-dockerized
-    - /opt/netdata
-    - /opt/gitea
-    - /home
+  - /var/www
+  - /srv/minecraftserver
+  - /srv/reddiscordbot
+  - /srv/waltercoiffure
+  - /etc
+  - /opt/nextcloud
+  - /opt/traefik
+  - /opt/n8n
+  - /opt/portainer
+  - /opt/uptime-kuma
+  - /opt/vaultwarden
+  - /opt/mailcow-dockerized
+  - /opt/netdata
+  - /opt/gitea
+  - /home
 
 # Patterns d'exclusion
 exclude_patterns:
-    - "*.log"
-    - "*/cache/*"
-    - "*/tmp/*"
-    - "**/__pycache__"
-    - "*/node_modules/*"
+  - "*.log"
+  - "*/cache/*"
+  - "*/tmp/*"
+  - "**/__pycache__"
+  - "*/node_modules/*"
+
+  - "/opt/nextcloud/backups"
+  #- "/opt/nextcloud/data/appdata_*/preview/*" # Miniatures d'images
+  #- "/opt/nextcloud/updater-*" # Fichiers de mise à jour
+
+  - "/opt/gitea/backups"
 
 # Un seul système de fichiers
 one_file_system: false
@@ -56,32 +62,31 @@ match_archives: "sh:backup-*"
 
 # Vérifications d'intégrité
 checks:
-    - name: repository
-      frequency: 2 weeks
-    - name: archives
-      frequency: 1 month
+  - name: repository
+    frequency: 2 weeks
+  - name: archives
+    frequency: 1 month
 
 # Nombre d'archives à vérifier
 check_last: 3
 
 # Hooks pour notifications (syntaxe Borgmatic 2.0)
 commands:
-    - before: action
-      when: [create]
-      run:
-          - echo "Backup démarré"
+  - before: action
+    when: [create]
+    run:
+      - echo "Backup démarré"
 
-    - after: action
-      when: [create]
-      run:
-          - echo "Exécution hook de succès"
-          - /etc/borgmatic/hooks/ntfy-success.sh
-
-    - after: error
-      run:
-          - echo "Exécution hook d'erreur"
-          - /etc/borgmatic/hooks/ntfy-error.sh
+  - after: action
+    when: [create]
+    run:
+      - echo "Exécution hook de succès"
+      - /etc/borgmatic/hooks/ntfy-success.sh
 
+  - after: error
+    run:
+      - echo "Exécution hook d'erreur"
+      - /etc/borgmatic/hooks/ntfy-error.sh
 # Commandes PostgreSQL/MySQL si nécessaire
 # postgresql_databases:
 #     - name: all