The couchdb:3 image purges curl after the build, so the curl-based
healthcheck could never succeed. The cors.ini bind-mount also looks
like the cause of the ~600ms container exit observed in the first two
Coolify deploys. Both pieces are removed; CORS is now applied by the
init sidecar via PUTs against /_node/_local/_config/..., which is
idempotent on redeploy.