docs(readme): update setup instructions for app configuration

Improves clarity and accuracy of setup instructions to prevent misconfiguration during deployment.

* Add explicit commands for setting file lock timeout and chunk size using `./occ`.
* Include command for setting maintenance window start time to ensure proper scheduling.
* Remove redundant and incorrect command comments to prevent confusion.

Signed-off-by: Glenn <glenux@glenux.net>

README.md

@@ -22,11 +22,18 @@ ssh dokku@buddha-apps.boldcode.io app-json:set cloud appjson-path /app/app.json
 
 Run after install
 
-    config:app:set files_lock lock_timeout --value '30' 
-    config:app:set files max_chunk_size --value 20971520
-
     # FIXME: config:global:set --value '/Shared' share_folder
 
+    # set file lock timeout
+    ./occ config:app:set files_lock lock_timeout --value '30' 
+
+    # set file chunk size
+    ./occ config:app:set files max_chunk_size --value 20971520
+
+    # set maintenance window
+    ./occ config:system:set maintenance_window_start --type=integer --value=1
+
+
 Add this in crontab
 
     dokku enter cloud web su -l -s /bin/bash - www-data -c "cd html && php -dmemory_limit=-1 ./occ app:update --all"