tbrock gave the work-around, but as for the "why", it's probably because Debian uses glibc for its libc, while Alpine uses musl. musl aims to be a much more compliant libc than glibc, so when you tell it to look up a name, it probably always does so. Like tbrock said, installing a local dns cache should help (or, failing that, an /etc/hosts entry?).
I do not think I want to do the /etc/hosts thing, as the IP can change for some things.. I would rather just cache it locally for ? 1 minute or something
