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Hosts with a search domain (e.g. search casjay.dev) cause containers to inherit it. When that zone has a wildcard AAAA record, public hostnames like github.com resolve to the host's own IPv6 address instead of the real server, breaking all HTTPS (and any other protocol) from inside the container. The entrypoint already has a hook: if /usr/local/etc/resolv.conf exists it replaces /etc/resolv.conf at container startup. Ship a clean resolv.conf with Cloudflare + Google DNS and no search domain so container DNS is always correct regardless of host configuration. - rootfs/usr/local/etc/resolv.conf: new file — clean DNS, no search domain rootfs/usr/local/etc/resolv.conf