The module is nextcloud; its tree was /var/lib/nextcloud-module — a
historic spelling nothing depends on. The root moves to
/var/lib/nextcloud (a rename on the node, done in this change's
window), and html drops its path: the mesh resolves it to
<root>/nextcloud/html. Landing this requires the window: rename the
tree, push, recreate the container — a changed volume path does not
recreate one by itself (hq 126).