feat: create util stack consolidating utility services

Consolidates 6 utility services into a single util stack:
- drop (PairDrop) - P2P file sharing
- joplin (Joplin Server) - Note-taking and sync
- links (Linkwarden) - Bookmark manager with Meilisearch
- mattermost (Mattermost) - Team collaboration
- vault (Vaultwarden) - Password manager
- tandoor (Tandoor) - Recipe manager

Changes:
- Created util/compose.yaml with all 6 services
- Moved rtc_config.json to util directory
- Updated environment variables to use UTIL_ prefix
- Updated restic volume references to util_* names
- Container names changed from {service}_app to util_{service}
- Volume names changed from {service}_* to util_{service}_*
- Removed individual stack directories (drop, joplin, links, mattermost, vault, tandoor)
- Updated compose.yaml to include util/compose.yaml instead of individual stacks

All services maintain their original hostnames and functionality.

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

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

arty.yml

@@ -40,25 +40,44 @@ envs:
     SEXY_PASSWORD_RESET_URL_ALLOW_LIST: https://sexy.pivoine.art/password/reset
     SEXY_FRONTEND_PUBLIC_API_URL: https://sexy.pivoine.art/api
     SEXY_FRONTEND_PUBLIC_URL: https://sexy.pivoine.art
+    # Util Stack (Mattermost, Tandoor, Linkwarden, Vault, Joplin, PairDrop)
+    UTIL_TRAEFIK_ENABLED: true
+    UTIL_COMPOSE_PROJECT_NAME: util
     # Mattermost
-    MATTERMOST_TRAEFIK_ENABLED: true
-    MATTERMOST_COMPOSE_PROJECT_NAME: mattermost
-    MATTERMOST_IMAGE: mattermost/mattermost-team-edition:latest
-    MATTERMOST_TRAEFIK_HOST: mattermost.pivoine.art
-    MATTERMOST_DB_NAME: mattermost
+    UTIL_MATTERMOST_IMAGE: mattermost/mattermost-team-edition:latest
+    UTIL_MATTERMOST_TRAEFIK_HOST: mattermost.pivoine.art
+    UTIL_MATTERMOST_DB_NAME: mattermost
     # Tandoor
-    TANDOOR_TRAEFIK_ENABLED: true
-    TANDOOR_COMPOSE_PROJECT_NAME: tandoor
-    TANDOOR_IMAGE: vabene1111/recipes:latest
-    TANDOOR_TRAEFIK_HOST: tandoor.pivoine.art
-    TANDOOR_DB_NAME: tandoor
-    TANDOOR_ENABLE_SIGNUP: 0
-    TANDOOR_REVERSE_PROXY_AUTH: 0
-    TANDOOR_EMAIL_USE_TLS: 0
-    TANDOOR_EMAIL_USE_SSL: 1
-    TANDOOR_GUNICORN_MEDIA: 0
-    TANDOOR_COMMENT_PREF_DEFAULT: 1
-    TANDOOR_SHOPPING_MIN_AUTOSYNC_INTERVAL: 5
+    UTIL_TANDOOR_IMAGE: vabene1111/recipes:latest
+    UTIL_TANDOOR_TRAEFIK_HOST: tandoor.pivoine.art
+    UTIL_TANDOOR_DB_NAME: tandoor
+    UTIL_TANDOOR_ENABLE_SIGNUP: 0
+    UTIL_TANDOOR_REVERSE_PROXY_AUTH: 0
+    UTIL_TANDOOR_EMAIL_USE_TLS: 0
+    UTIL_TANDOOR_EMAIL_USE_SSL: 1
+    UTIL_TANDOOR_GUNICORN_MEDIA: 0
+    UTIL_TANDOOR_COMMENT_PREF_DEFAULT: 1
+    UTIL_TANDOOR_SHOPPING_MIN_AUTOSYNC_INTERVAL: 5
+    # Linkwarden
+    UTIL_LINKS_DOCKER_IMAGE: ghcr.io/linkwarden/linkwarden:latest
+    UTIL_LINKS_TRAEFIK_HOST: links.pivoine.art
+    UTIL_LINKS_DB_NAME: linkwarden
+    UTIL_LINKS_MEILI_IMAGE: getmeili/meilisearch:v1.12.8
+    UTIL_LINKS_MEILI_NO_ANALYTICS: true
+    # Vault
+    UTIL_VAULT_IMAGE: vaultwarden/server:latest
+    UTIL_VAULT_TRAEFIK_HOST: vault.pivoine.art
+    UTIL_VAULT_WEBSOCKET_ENABLED: true
+    UTIL_VAULT_SIGNUPS_ALLOWED: true
+    UTIL_VAULT_INVITATIONS_ALLOWED: true
+    UTIL_VAULT_SHOW_PASSWORD_HINT: false
+    # Joplin
+    UTIL_JOPLIN_IMAGE: joplin/server:latest
+    UTIL_JOPLIN_TRAEFIK_HOST: joplin.pivoine.art
+    UTIL_JOPLIN_APP_PORT: 22300
+    UTIL_JOPLIN_DB_NAME: joplin
+    # PairDrop
+    UTIL_DROP_TRAEFIK_HOST: drop.pivoine.art
     # Filestash
     STASH_TRAEFIK_ENABLED: true
     STASH_COMPOSE_PROJECT_NAME: stash
@@ -66,14 +85,6 @@ envs:
     STASH_TRAEFIK_HOST: stash.pivoine.art
     STASH_PORT: 8334
     STASH_CANARY: true
-    # Linkwarden
-    LINKS_TRAEFIK_ENABLED: true
-    LINKS_COMPOSE_PROJECT_NAME: links
-    LINKS_DOCKER_IMAGE: ghcr.io/linkwarden/linkwarden:latest
-    LINKS_TRAEFIK_HOST: links.pivoine.art
-    LINKS_DB_NAME: linkwarden
-    LINKS_MEILI_IMAGE: getmeili/meilisearch:v1.12.8
-    LINKS_MEILI_NO_ANALYTICS: true
     # Restic
     RESTIC_TRAEFIK_ENABLED: true
     RESTIC_COMPOSE_PROJECT_NAME: restic
@@ -81,22 +92,6 @@ envs:
     RESTIC_TRAEFIK_HOST: restic.pivoine.art
     RESTIC_HOSTNAME: falcon
     RESTIC_BACKUP_PATH: /mnt/hidrive/users/valknar/Backup
-    # Vault
-    VAULT_TRAEFIK_ENABLED: true
-    VAULT_COMPOSE_PROJECT_NAME: vault
-    VAULT_IMAGE: vaultwarden/server:latest
-    VAULT_TRAEFIK_HOST: vault.pivoine.art
-    VAULT_WEBSOCKET_ENABLED: true
-    VAULT_SIGNUPS_ALLOWED: true
-    VAULT_INVITATIONS_ALLOWED: true
-    VAULT_SHOW_PASSWORD_HINT: false
-    # Joplin
-    JOPLIN_TRAEFIK_ENABLED: true
-    JOPLIN_COMPOSE_PROJECT_NAME: joplin
-    JOPLIN_IMAGE: joplin/server:latest
-    JOPLIN_TRAEFIK_HOST: joplin.pivoine.art
-    JOPLIN_APP_PORT: 22300
-    JOPLIN_DB_NAME: joplin
     # Jellyfin
     JELLY_TRAEFIK_ENABLED: true
     JELLY_COMPOSE_PROJECT_NAME: jelly