Found by actually installing it. The compose bind-mounts
./resources/nginx.conf into the web container, but nothing ever copied
that file into the container tree, so Docker created a DIRECTORY in its
place and nginx died with:
error mounting ".../resources/nginx.conf" to rootfs at
"/etc/nginx/nginx.conf": not a directory
Worse than a hard failure: the app still recorded as installed. Three of
four containers came up, the DB and the app itself were fine, and only
the web front end was missing — a quiet, partial install.
Apps needing a resource file declare the copy in a hook (authelia does
exactly this); Nextcloud simply never had one. Adds
nextcloud_install_post_compose — after the compose file is written,
before permissions and `up` — which repairs any stub directory left by a
previous attempt and then copies the file.
The stub repair matters: without it the copy lands INSIDE the directory
(resources/nginx.conf/nginx.conf) and the mount fails identically.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
