feat: add drawio instance for nextcloud and opencloud

Signed-off-by: Bert-Jan Fikse <bert-jan@whatwedo.ch>

inventories/vagrant/host_vars/backend/nextcloud.yml

@@ -1,4 +1,18 @@
 nextcloud_collabora_disable_cert_verification: true
+
+# Draw.io integration
+nextcloud_enable_drawio: true
+nextcloud_drawio_url: "https://drawio.local.test"
+
+# Apps to install (override defaults to include drawio)
+nextcloud_apps_to_install:
+  - groupfolders
+  - richdocuments
+  - spreed
+  - user_ldap
+  - user_oidc
+  - whiteboard
+  - drawio
 nextcloud_allow_local_remote_servers: true  # Allow requests to local network in Vagrant
 nextcloud_oidc_allow_selfsigned: true  # Allow self-signed certs for OIDC in Vagrant