doc: add "whiteboard" instructions to README

Had a hiccup installing whiteboard today. Expected it to "just work",
 but there are a few manual steps I needed to do. I wrote those out in
 the README, since we don't have more structured nextcloud docs yet.

README.md

@@ -399,6 +399,42 @@ docker exec -u www-data $(docker ps -f name=foo_com_app -q) ./occ preview:pre-ge
 
 This app will improve performance of image browsing at the cost of storage space.
 
+## Using [`whiteboard`](https://github.com/nextcloud/whiteboard) app
+
+1. Uncomment the following lines in your env file:
+```
+# COMPOSE_FILE="$COMPOSE_FILE:compose.whiteboard.yml"
+# APPS="$APPS whiteboard"
+# SECRET_WHITEBOARD_JWT_VERSION=v1
+```
+
+2. Generate the secret for whiteboard
+```bash
+abra app secret generate <domain> whiteboard_jwt v1
+```
+make note of this secret for a future step.
+
+3. Deploy your app
+```bash
+abra app deploy -f <domain>
+```
+
+Note: Depending on your deployment, you may need to manually install the Whiteboard app.
+From an admin account, visit
+```
+https://<your domain>/settings/apps/search?q=whiteboard
+```
+and install the "Whiteboard" app.
+
+4. From an admin account, visit the Whiteboard Administration Settings:
+```
+https://<your domain>/settings/admin/whiteboard
+```
+And fill in:
+
+- Websocket URL: `https://<your domain>/whiteboard`
+- Shared Secret: the `whiteboard_jwt` secret you generated earlier
+
 ## Fulltextsearch using elasticsearch
 
 1. Uncomment the following lines in your env file:

compose.fulltextsearch.yml

@@ -29,7 +29,7 @@ services:
         mode: 0600
 
   searchindexer:
-    image: nextcloud:35.0.3-fpm
+    image: nextcloud:34.0.5-fpm
     volumes:
       - nextcloud:/var/www/html/
       - nextapps:/var/www/html/custom_apps:cached

compose.yml

@@ -48,7 +48,7 @@ services:
       start_period: 5m
 
   app:
-    image: nextcloud:35.0.3-fpm
+    image: nextcloud:34.0.5-fpm
     depends_on:
       - db
     configs:
@@ -109,7 +109,7 @@ services:
       start_period: 15m
 
   cron:
-    image: nextcloud:35.0.3-fpm
+    image: nextcloud:34.0.5-fpm
     volumes:
       - nextcloud:/var/www/html/
       - nextapps:/var/www/html/custom_apps:cached

release/next

@@ -1,13 +0,0 @@
-Upgrades Nextcloud from 34 to 35 (major version upgrade).
-
-IMPORTANT:
-- Do not skip major versions: your instance must be on the latest 34.x before
-  upgrading to 35.
-- Use `check_major_upgrade` (`abra app cmd <app-name> app check_major_upgrade`)
-  to check whether an instance is ready to upgrade to the next Nextcloud
-  major version.
-- Nextcloud does NOT support downgrades. Take a backup before deploying.
-- 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.