Update to latest nextcloud v35.0.0

Euro-Office overlay is already at the latest published document server
image (v9.3.4-hotfix.1); documented that in the README instead of the
stale "latest tag, no pinning" note.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

README.md

@@ -75,8 +75,8 @@ Nextcloud app:
 * `abra app cmd <app-name> app install_eurooffice`
 
 > Note: the document server needs ~4 GB RAM (8 GB for multi-user) and pulls the
-> `ghcr.io/euro-office/documentserver` image, which currently only publishes a
-> `latest` tag (no semver / Renovate pinning yet).
+> `ghcr.io/euro-office/documentserver` image, pinned to a semver tag
+> (`v9.3.4-hotfix.1`). It is not tracked by Renovate, so upgrade it manually.
 
 ### BBB Integration
 

compose.yml

@@ -48,7 +48,7 @@ services:
       start_period: 5m
 
   app:
-    image: nextcloud:34.0.4-fpm
+    image: nextcloud:35.0.0-fpm
     depends_on:
       - db
     configs:
@@ -95,7 +95,7 @@ services:
         failure_action: rollback
         order: start-first
       labels:
-        - "coop-cloud.${STACK_NAME}.version=15.1.3+34.0.4-fpm"
+        - "coop-cloud.${STACK_NAME}.version=16.0.0+35.0.0-fpm"
         - "coop-cloud.${STACK_NAME}.timeout=${TIMEOUT}"
         - "backupbot.backup=${ENABLE_BACKUPS:-true}"
         - "backupbot.backup.volumes.redis=false"
@@ -109,7 +109,7 @@ services:
       start_period: 15m
 
   cron:
-    image: nextcloud:34.0.4-fpm
+    image: nextcloud:35.0.0-fpm
     volumes:
       - nextcloud:/var/www/html/
       - nextapps:/var/www/html/custom_apps:cached

release/16.0.0+35.0.0-fpm

@@ -0,0 +1,17 @@
+Upgrades Nextcloud from 34.0.4 to 35.0.0 (major version upgrade).
+
+Euro-Office (compose.eurooffice.yml) is already at the latest published
+document server image, v9.3.4-hotfix.1 — no change needed there.
+
+IMPORTANT:
+- Nextcloud does NOT support downgrades. Take a backup before deploying.
+- Do not skip major versions: your instance must be on the latest 34.x
+  (34.0.4) before upgrading to 35. If you are on an older 34.x, deploy
+  34.0.4 first.
+- Nextcloud 35 drops support for MariaDB < 10.11 and MySQL < 8.4. This
+  recipe's mariadb overlay already runs MariaDB 12.3, so no action is
+  needed there.
+- After deploying, check the logs and run any pending repair/upgrade steps:
+  `abra app cmd <app> app run_occ '"app:update --all"'`
+- Review app (plug-in) compatibility with Nextcloud 35 before upgrading; some
+  apps may need to be updated or temporarily disabled.