* fix(docker): migrate retained SearXNG settings
Retained nonempty SearXNG settings can miss defaults required by newer pinned images while bypassing the entrypoint's narrow regeneration checks.
Add an atomic PyYAML-aware migration to all Compose variants. Preserve existing inheritance choices, custom content, secrets, ownership, and mode while inserting only the missing top-level default-inheritance key.
Validated with 39 focused and adjacent tests, compile checks, and fresh and retained pinned-image HTTP 200 gates. Full repository CI remains for the PR.
* fix(docker): chmod the settings temp file before chowning it
The Compose cap set is `cap_drop: ALL` plus CHOWN/SETGID/SETUID/DAC_OVERRIDE
and carries no FOWNER, and searxng's own entrypoint chowns /etc/searxng to
searxng:searxng, so every retained settings file belongs to that user by the
second boot. Chowning the temporary file first left root unable to chmod it,
so the migration exited 1 and `set -eu` killed the container before
`exec /usr/local/searxng/entrypoint.sh` — SearXNG never started and odysseus
blocked on its healthcheck.
Swap the two calls so the chmod lands while the temporary file is still
root-owned, and cover the ordering with a test that refuses the chmod once
the chown has happened, the way the kernel does.
* fix(docker): let searxng boot when the settings migration fails
The migration runs under `set -eu`, so any settings file it cannot parse or
rewrite took the container down instead of merely going unmigrated. A symlinked
/etc/searxng/settings.yml is enough: the migration refuses a non-regular file
and searxng, which reads through the symlink perfectly well, never got to start.
Guard the call with `|| true` in all three Compose variants. The failure still
prints its reason on stderr, and searxng is left to report anything genuinely
wrong with the file.
---------
Co-authored-by: Léo <leograndcontact@gmail.com>
